396087731 has 8 divisors (see below), whose sum is σ = 428181600. Its totient is φ = 364226112.

The previous prime is 396087721. The next prime is 396087733. The reversal of 396087731 is 137780693.

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

It is a cyclic number.

It is not a de Polignac number, because 396087731 - 2⁶ = 396087667 is a prime.

It is a super-2 number, since 2×396087731² = 313770981297456722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396087733) 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, 54506 + ... + 61343.

It is an arithmetic number, because the mean of its divisors is an integer number (53522700).

Almost surely, 2^396087731 is an apocalyptic number.

396087731 is a deficient number, since it is larger than the sum of its proper divisors (32093869).

396087731 is a wasteful number, since it uses less digits than its factorization.

396087731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116125.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 396087731 is about 19901.9529443721. The cubic root of 396087731 is about 734.3962716301.

The spelling of 396087731 in words is "three hundred ninety-six million, eighty-seven thousand, seven hundred thirty-one".