921810464 has 12 divisors (see below), whose sum is σ = 1814814414. Its totient is φ = 460905216.

The previous prime is 921810437. The next prime is 921810509. The reversal of 921810464 is 464018129.

It is a happy number.

921810464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 881614864 + 40195600 = 29692^2 + 6340^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14403257 + ... + 14403320.

Almost surely, 2^921810464 is an apocalyptic number.

It is an amenable number.

921810464 is a deficient number, since it is larger than the sum of its proper divisors (893003950).

921810464 is a wasteful number, since it uses less digits than its factorization.

921810464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28806587 (or 28806579 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 921810464 is about 30361.3317230980. The cubic root of 921810464 is about 973.2263926210.

The spelling of 921810464 in words is "nine hundred twenty-one million, eight hundred ten thousand, four hundred sixty-four".