390040336 has 40 divisors (see below), whose sum is σ = 868230144. Its totient is φ = 166275840.

The previous prime is 390040319. The next prime is 390040337. The reversal of 390040336 is 633040093.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (390040337) 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, 12276 + ... + 30508.

Almost surely, 2^390040336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390040336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434115072).

390040336 is an abundant number, since it is smaller than the sum of its proper divisors (478189808).

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

390040336 is a wasteful number, since it uses less digits than its factorization.

390040336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18439 (or 18433 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 28.

The square root of 390040336 is about 19749.4388781049. The cubic root of 390040336 is about 730.6395446241.

The spelling of 390040336 in words is "three hundred ninety million, forty thousand, three hundred thirty-six".