39640212972 has 48 divisors (see below), whose sum is σ = 102795648480. Its totient is φ = 13210225344.

The previous prime is 39640212919. The next prime is 39640212973. The reversal of 39640212972 is 27921204693.

39640212972 is a `hidden beast` number, since 396 + 40 + 212 + 9 + 7 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (39640212973) 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, 430318 + ... + 514250.

It is an arithmetic number, because the mean of its divisors is an integer number (2141576010).

Almost surely, 2^39640212972 is an apocalyptic number.

It is an amenable number.

39640212972 is an abundant number, since it is smaller than the sum of its proper divisors (63155435508).

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

39640212972 is a wasteful number, since it uses less digits than its factorization.

39640212972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88319 (or 88311 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 39640212972 in words is "thirty-nine billion, six hundred forty million, two hundred twelve thousand, nine hundred seventy-two".