29640972 has 24 divisors (see below), whose sum is σ = 69607216. Its totient is φ = 9816768.

The previous prime is 29640971. The next prime is 29640983. The reversal of 29640972 is 27904692.

It is a super-2 number, since 2×29640972² = 1757174442209568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 29640972.

It is not an unprimeable number, because it can be changed into a prime (29640971) 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, 5983 + ... + 9750.

Almost surely, 2^29640972 is an apocalyptic number.

It is an amenable number.

29640972 is an abundant number, since it is smaller than the sum of its proper divisors (39966244).

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

29640972 is a wasteful number, since it uses less digits than its factorization.

29640972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15897 (or 15895 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 29640972 is about 5444.3523030752. The cubic root of 29640972 is about 309.4787355017.

The spelling of 29640972 in words is "twenty-nine million, six hundred forty thousand, nine hundred seventy-two".