921209480 has 32 divisors (see below), whose sum is σ = 2107857600. Its totient is φ = 362237376.

The previous prime is 921209479. The next prime is 921209503. The reversal of 921209480 is 84902129.

It is a self number, because there is not a number n which added to its sum of digits gives 921209480.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192812 + ... + 197531.

It is an arithmetic number, because the mean of its divisors is an integer number (65870550).

Almost surely, 2^921209480 is an apocalyptic number.

It is an amenable number.

921209480 is an abundant number, since it is smaller than the sum of its proper divisors (1186648120).

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

921209480 is a wasteful number, since it uses less digits than its factorization.

921209480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390413 (or 390409 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 921209480 is about 30351.4329151030. The cubic root of 921209480 is about 973.0148449228.

The spelling of 921209480 in words is "nine hundred twenty-one million, two hundred nine thousand, four hundred eighty".