391014972 has 48 divisors (see below), whose sum is σ = 1014808480. Its totient is φ = 130201344.

The previous prime is 391014971. The next prime is 391014979. The reversal of 391014972 is 279410193.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391014971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201318 + ... + 203250.

Almost surely, 2^391014972 is an apocalyptic number.

It is an amenable number.

391014972 is an abundant number, since it is smaller than the sum of its proper divisors (623793508).

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

391014972 is a wasteful number, since it uses less digits than its factorization.

391014972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3819 (or 3811 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 391014972 is about 19774.0985129538. The cubic root of 391014972 is about 731.2476144564.

The spelling of 391014972 in words is "three hundred ninety-one million, fourteen thousand, nine hundred seventy-two".