921036928 has 48 divisors (see below), whose sum is σ = 2134464750. Its totient is φ = 394727424.

The previous prime is 921036923. The next prime is 921036943. The reversal of 921036928 is 829630129.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 904325184 + 16711744 = 30072^2 + 4088^2 .

It is not an unprimeable number, because it can be changed into a prime (921036923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67153 + ... + 79696.

Almost surely, 2^921036928 is an apocalyptic number.

921036928 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

921036928 is an abundant number, since it is smaller than the sum of its proper divisors (1213427822).

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

921036928 is a wasteful number, since it uses less digits than its factorization.

921036928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146877 (or 146858 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 921036928 is about 30348.5902143740. The cubic root of 921036928 is about 972.9540892369.

The spelling of 921036928 in words is "nine hundred twenty-one million, thirty-six thousand, nine hundred twenty-eight".