391490480 has 20 divisors (see below), whose sum is σ = 910215552. Its totient is φ = 156596160.

The previous prime is 391490431. The next prime is 391490507. The reversal of 391490480 is 84094193.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2446736 + ... + 2446895.

Almost surely, 2^391490480 is an apocalyptic number.

It is an amenable number.

391490480 is an abundant number, since it is smaller than the sum of its proper divisors (518725072).

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

391490480 is a wasteful number, since it uses less digits than its factorization.

391490480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4893644 (or 4893638 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 391490480 is about 19786.1183661677. The cubic root of 391490480 is about 731.5439144795.

The spelling of 391490480 in words is "three hundred ninety-one million, four hundred ninety thousand, four hundred eighty".