247722804 has 72 divisors (see below), whose sum is σ = 718885440. Its totient is φ = 70457472.

The previous prime is 247722803. The next prime is 247722821. The reversal of 247722804 is 408227742.

247722804 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247722804² = 122733175243244832, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247722803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56607 + ... + 60825.

It is an arithmetic number, because the mean of its divisors is an integer number (9984520).

Almost surely, 2^247722804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247722804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359442720).

247722804 is an abundant number, since it is smaller than the sum of its proper divisors (471162636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

247722804 is a wasteful number, since it uses less digits than its factorization.

247722804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4469 (or 4464 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 247722804 is about 15739.2123055762. The cubic root of 247722804 is about 628.0419630634.

It can be divided in two parts, 2477 and 22804, that added together give a square (25281 = 159²).

The spelling of 247722804 in words is "two hundred forty-seven million, seven hundred twenty-two thousand, eight hundred four".