39964731 has 8 divisors (see below), whose sum is σ = 55603200. Its totient is φ = 25484712.

The previous prime is 39964643. The next prime is 39964747. The reversal of 39964731 is 13746993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 39964731 - 2⁹ = 39964219 is a prime.

It is a super-2 number, since 2×39964731² = 3194359447804722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39964781) 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, 289531 + ... + 289668.

It is an arithmetic number, because the mean of its divisors is an integer number (6950400).

Almost surely, 2^39964731 is an apocalyptic number.

39964731 is a deficient number, since it is larger than the sum of its proper divisors (15638469).

39964731 is a wasteful number, since it uses less digits than its factorization.

39964731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579225.

The product of its digits is 122472, while the sum is 42.

The square root of 39964731 is about 6321.7664461763. The cubic root of 39964731 is about 341.8946445425.

The spelling of 39964731 in words is "thirty-nine million, nine hundred sixty-four thousand, seven hundred thirty-one".