247394790 has 64 divisors (see below), whose sum is σ = 661478400. Its totient is φ = 65796192.

The previous prime is 247394783. The next prime is 247394803. The reversal of 247394790 is 97493742.

247394790 is a `hidden beast` number, since 2 + 473 + 94 + 7 + 90 = 666.

It is a super-2 number, since 2×247394790² = 122408364238288200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124021 + ... + 125999.

It is an arithmetic number, because the mean of its divisors is an integer number (10335600).

Almost surely, 2^247394790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247394790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330739200).

247394790 is an abundant number, since it is smaller than the sum of its proper divisors (414083610).

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

247394790 is a wasteful number, since it uses less digits than its factorization.

247394790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458 (or 2452 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 247394790 is about 15728.7885738222. The cubic root of 247394790 is about 627.7646402578.

The spelling of 247394790 in words is "two hundred forty-seven million, three hundred ninety-four thousand, seven hundred ninety".