39970656 has 216 divisors, whose sum is σ = 132455232. Its totient is φ = 11404800.

The previous prime is 39970643. The next prime is 39970673. The reversal of 39970656 is 65607993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1080270 + ... + 1080306.

Almost surely, 2^39970656 is an apocalyptic number.

39970656 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39970656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66227616).

39970656 is an abundant number, since it is smaller than the sum of its proper divisors (92484576).

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

39970656 is a wasteful number, since it uses less digits than its factorization.

39970656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The square root of 39970656 is about 6322.2350478292. The cubic root of 39970656 is about 341.9115396532.

The spelling of 39970656 in words is "thirty-nine million, nine hundred seventy thousand, six hundred fifty-six".