551588940 has 240 divisors, whose sum is σ = 1998323712. Its totient is φ = 124758144.

The previous prime is 551588929. The next prime is 551588963. The reversal of 551588940 is 49885155.

It is a happy number.

551588940 is a `hidden beast` number, since 551 + 5 + 8 + 8 + 94 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1439989 + ... + 1440371.

Almost surely, 2^551588940 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 551588940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (999161856).

551588940 is an abundant number, since it is smaller than the sum of its proper divisors (1446734772).

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

551588940 is a wasteful number, since it uses less digits than its factorization.

551588940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 45.

The square root of 551588940 is about 23485.9306820062. The cubic root of 551588940 is about 820.1095134322.

The spelling of 551588940 in words is "five hundred fifty-one million, five hundred eighty-eight thousand, nine hundred forty".