39730638 has 16 divisors (see below), whose sum is σ = 82201680. Its totient is φ = 12786816.

The previous prime is 39730633. The next prime is 39730693. The reversal of 39730638 is 83603793.

It is a junction number, because it is equal to n+sod(n) for n = 39730596 and 39730605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39730631) 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, 113995 + ... + 114342.

It is an arithmetic number, because the mean of its divisors is an integer number (5137605).

Almost surely, 2^39730638 is an apocalyptic number.

39730638 is an abundant number, since it is smaller than the sum of its proper divisors (42471042).

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

39730638 is a wasteful number, since it uses less digits than its factorization.

39730638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228371.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 39730638 is about 6303.2244129493. The cubic root of 39730638 is about 341.2257887799.

The spelling of 39730638 in words is "thirty-nine million, seven hundred thirty thousand, six hundred thirty-eight".