39907072 has 18 divisors (see below), whose sum is σ = 79658768. Its totient is φ = 19953408.

The previous prime is 39907057. The next prime is 39907073. The reversal of 39907072 is 27070993.

It is a super-2 number, since 2×39907072² = 3185148791226368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39907073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77688 + ... + 78199.

Almost surely, 2^39907072 is an apocalyptic number.

39907072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

39907072 is a deficient number, since it is larger than the sum of its proper divisors (39751696).

39907072 is an equidigital number, since it uses as much as digits as its factorization.

39907072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155903 (or 155889 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 37.

The square root of 39907072 is about 6317.2044450057. The cubic root of 39907072 is about 341.7301429027.

The spelling of 39907072 in words is "thirty-nine million, nine hundred seven thousand, seventy-two".