921628368 has 50 divisors (see below), whose sum is σ = 2667463634. Its totient is φ = 307209024.

The previous prime is 921628319. The next prime is 921628369. The reversal of 921628368 is 863826129.

It can be written as a sum of positive squares in only one way, i.e., 921001104 + 627264 = 30348^2 + 792^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921628369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 354271 + ... + 356862.

Almost surely, 2^921628368 is an apocalyptic number.

It is an amenable number.

921628368 is an abundant number, since it is smaller than the sum of its proper divisors (1745835266).

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

921628368 is a wasteful number, since it uses less digits than its factorization.

921628368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711153 (or 711138 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 921628368 is about 30358.3327605453. The cubic root of 921628368 is about 973.1623041376.

The spelling of 921628368 in words is "nine hundred twenty-one million, six hundred twenty-eight thousand, three hundred sixty-eight".