390887616 has 56 divisors (see below), whose sum is σ = 1181973760. Its totient is φ = 111681792.

The previous prime is 390887611. The next prime is 390887617. The reversal of 390887616 is 616788093.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (390887611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144076 + ... + 146763.

Almost surely, 2^390887616 is an apocalyptic number.

It is an amenable number.

390887616 is an abundant number, since it is smaller than the sum of its proper divisors (791086144).

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

390887616 is a wasteful number, since it uses less digits than its factorization.

390887616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290861 (or 290851 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 390887616 is about 19770.8779774698. The cubic root of 390887616 is about 731.1682152087.

The spelling of 390887616 in words is "three hundred ninety million, eight hundred eighty-seven thousand, six hundred sixteen".