247128972 has 24 divisors (see below), whose sum is σ = 606984000. Its totient is φ = 78040656.

The previous prime is 247128971. The next prime is 247128989. The reversal of 247128972 is 279821742.

It is a super-2 number, since 2×247128972² = 122145457603553568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247128971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541722 + ... + 542177.

It is an arithmetic number, because the mean of its divisors is an integer number (25291000).

Almost surely, 2^247128972 is an apocalyptic number.

It is an amenable number.

247128972 is an abundant number, since it is smaller than the sum of its proper divisors (359855028).

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

247128972 is a wasteful number, since it uses less digits than its factorization.

247128972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083925 (or 1083923 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 247128972 is about 15720.3362559457. The cubic root of 247128972 is about 627.5397218285.

The spelling of 247128972 in words is "two hundred forty-seven million, one hundred twenty-eight thousand, nine hundred seventy-two".