551580840 has 96 divisors (see below), whose sum is σ = 1859064480. Its totient is φ = 147085632.

The previous prime is 551580829. The next prime is 551580857. The reversal of 551580840 is 48085155.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 551580795 and 551580804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18654 + ... + 38093.

It is an arithmetic number, because the mean of its divisors is an integer number (19365255).

Almost surely, 2^551580840 is an apocalyptic number.

It is an amenable number.

551580840 is an abundant number, since it is smaller than the sum of its proper divisors (1307483640).

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

551580840 is a wasteful number, since it uses less digits than its factorization.

551580840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56773 (or 56757 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

The square root of 551580840 is about 23485.7582377065. The cubic root of 551580840 is about 820.1054990179.

The spelling of 551580840 in words is "five hundred fifty-one million, five hundred eighty thousand, eight hundred forty".