39974390 has 16 divisors (see below), whose sum is σ = 72334080. Its totient is φ = 15905280.

The previous prime is 39974369. The next prime is 39974399. The reversal of 39974390 is 9347993.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39974399) 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, 8555 + ... + 12374.

It is an arithmetic number, because the mean of its divisors is an integer number (4520880).

Almost surely, 2^39974390 is an apocalyptic number.

39974390 is a deficient number, since it is larger than the sum of its proper divisors (32359690).

39974390 is a wasteful number, since it uses less digits than its factorization.

39974390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21127.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 39974390 is about 6322.5303478908. The cubic root of 39974390 is about 341.9221862797.

The spelling of 39974390 in words is "thirty-nine million, nine hundred seventy-four thousand, three hundred ninety".