921926928 has 160 divisors (see below), whose sum is σ = 2675134336. Its totient is φ = 271724544.

The previous prime is 921926903. The next prime is 921926933. The reversal of 921926928 is 829629129.

It is a happy number.

It is a super-3 number, since 3×921926928³ (a number of 28 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1685151 + ... + 1685697.

Almost surely, 2^921926928 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 921926928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1337567168).

921926928 is an abundant number, since it is smaller than the sum of its proper divisors (1753207408).

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

921926928 is a wasteful number, since it uses less digits than its factorization.

921926928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681 (or 675 counting only the distinct ones).

The product of its digits is 279936, while the sum is 48.

The square root of 921926928 is about 30363.2496284571. The cubic root of 921926928 is about 973.2673775703.

The spelling of 921926928 in words is "nine hundred twenty-one million, nine hundred twenty-six thousand, nine hundred twenty-eight".