39974420 has 24 divisors (see below), whose sum is σ = 85131648. Its totient is φ = 15764000.

The previous prime is 39974419. The next prime is 39974443. The reversal of 39974420 is 2447993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12656 + ... + 15495.

It is an arithmetic number, because the mean of its divisors is an integer number (3547152).

Almost surely, 2^39974420 is an apocalyptic number.

It is an amenable number.

39974420 is an abundant number, since it is smaller than the sum of its proper divisors (45157228).

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

39974420 is a wasteful number, since it uses less digits than its factorization.

39974420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28231 (or 28229 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 39974420 is about 6322.5327203582. The cubic root of 39974420 is about 341.9222718150.

The spelling of 39974420 in words is "thirty-nine million, nine hundred seventy-four thousand, four hundred twenty".