391034016 has 72 divisors (see below), whose sum is σ = 1120863744. Its totient is φ = 129306240.

The previous prime is 391033997. The next prime is 391034027. The reversal of 391034016 is 610430193.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31231 + ... + 41921.

It is an arithmetic number, because the mean of its divisors is an integer number (15567552).

Almost surely, 2^391034016 is an apocalyptic number.

391034016 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391034016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (560431872).

391034016 is an abundant number, since it is smaller than the sum of its proper divisors (729829728).

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

391034016 is a wasteful number, since it uses less digits than its factorization.

391034016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10834 (or 10823 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 391034016 is about 19774.5800461097. The cubic root of 391034016 is about 731.2594858292.

The spelling of 391034016 in words is "three hundred ninety-one million, thirty-four thousand, sixteen".