921204480 has 288 divisors, whose sum is σ = 3444908544. Its totient is φ = 205406208.

The previous prime is 921204461. The next prime is 921204491. The reversal of 921204480 is 84402129.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1155442 + ... + 1156238.

It is an arithmetic number, because the mean of its divisors is an integer number (11961488).

Almost surely, 2^921204480 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 921204480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1722454272).

921204480 is an abundant number, since it is smaller than the sum of its proper divisors (2523704064).

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

921204480 is a wasteful number, since it uses less digits than its factorization.

921204480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871 (or 857 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 921204480 is about 30351.3505465572. The cubic root of 921204480 is about 973.0130845259.

The spelling of 921204480 in words is "nine hundred twenty-one million, two hundred four thousand, four hundred eighty".