247038428 has 48 divisors (see below), whose sum is σ = 541148160. Its totient is φ = 96064704.

The previous prime is 247038427. The next prime is 247038431. The reversal of 247038428 is 824830742.

It is a happy number.

It is a super-2 number, since 2×247038428² = 122055969817422368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247038391 and 247038400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247038427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15725 + ... + 27227.

It is an arithmetic number, because the mean of its divisors is an integer number (11273920).

Almost surely, 2^247038428 is an apocalyptic number.

247038428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247038428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270574080).

247038428 is an abundant number, since it is smaller than the sum of its proper divisors (294109732).

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

247038428 is a wasteful number, since it uses less digits than its factorization.

247038428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11586 (or 11584 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 247038428 is about 15717.4561554979. The cubic root of 247038428 is about 627.4630723813.

The spelling of 247038428 in words is "two hundred forty-seven million, thirty-eight thousand, four hundred twenty-eight".