39072640 has 32 divisors (see below), whose sum is σ = 93409560. Its totient is φ = 15628800.

The previous prime is 39072637. The next prime is 39072641. The reversal of 39072640 is 4627093.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39072641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29886 + ... + 31165.

Almost surely, 2^39072640 is an apocalyptic number.

It is an amenable number.

39072640 is an abundant number, since it is smaller than the sum of its proper divisors (54336920).

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

39072640 is an equidigital number, since it uses as much as digits as its factorization.

39072640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61070 (or 61058 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 39072640 is about 6250.8111473632. The cubic root of 39072640 is about 339.3315586753.

The spelling of 39072640 in words is "thirty-nine million, seventy-two thousand, six hundred forty".