247572872 has 8 divisors (see below), whose sum is σ = 464199150. Its totient is φ = 123786432.

The previous prime is 247572847. The next prime is 247572877. The reversal of 247572872 is 278275742.

It can be written as a sum of positive squares in only one way, i.e., 244797316 + 2775556 = 15646^2 + 1666^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×247572872² = 122584653900656768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247572877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15473297 + ... + 15473312.

Almost surely, 2^247572872 is an apocalyptic number.

It is an amenable number.

247572872 is a deficient number, since it is larger than the sum of its proper divisors (216626278).

247572872 is a wasteful number, since it uses less digits than its factorization.

247572872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30946615 (or 30946611 counting only the distinct ones).

The product of its digits is 439040, while the sum is 44.

The square root of 247572872 is about 15734.4485762927. The cubic root of 247572872 is about 627.9152319084.

The spelling of 247572872 in words is "two hundred forty-seven million, five hundred seventy-two thousand, eight hundred seventy-two".