921499416 has 160 divisors (see below), whose sum is σ = 2852483040. Its totient is φ = 276452352.

The previous prime is 921499379. The next prime is 921499421. The reversal of 921499416 is 614994129.

921499416 is a `hidden beast` number, since 92 + 149 + 9 + 416 = 666.

It is a super-2 number, since 2×921499416² = 1698322347376682112, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 251550 + ... + 255186.

It is an arithmetic number, because the mean of its divisors is an integer number (17828019).

Almost surely, 2^921499416 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 921499416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1426241520).

921499416 is an abundant number, since it is smaller than the sum of its proper divisors (1930983624).

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

921499416 is a wasteful number, since it uses less digits than its factorization.

921499416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3695 (or 3682 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 921499416 is about 30356.2088542031. The cubic root of 921499416 is about 973.1169145196.

The spelling of 921499416 in words is "nine hundred twenty-one million, four hundred ninety-nine thousand, four hundred sixteen".