247457028 has 48 divisors (see below), whose sum is σ = 710648960. Its totient is φ = 65263104.

The previous prime is 247457027. The next prime is 247457039. The reversal of 247457028 is 820754742.

It is a super-2 number, since 2×247457028² = 122469961413185568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (247457027) 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, 112213 + ... + 114396.

Almost surely, 2^247457028 is an apocalyptic number.

247457028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

247457028 is an abundant number, since it is smaller than the sum of its proper divisors (463191932).

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

247457028 is a wasteful number, since it uses less digits than its factorization.

247457028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226636 (or 226634 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 39.

The square root of 247457028 is about 15730.7669234529. The cubic root of 247457028 is about 627.8172788492.

The spelling of 247457028 in words is "two hundred forty-seven million, four hundred fifty-seven thousand, twenty-eight".