551890944 has 156 divisors (see below), whose sum is σ = 1740358152. Its totient is φ = 167116800.

The previous prime is 551890931. The next prime is 551890949. The reversal of 551890944 is 449098155.

551890944 is a `hidden beast` number, since 5 + 518 + 90 + 9 + 44 = 666.

It is a super-2 number, since 2×551890944² = 609167228138422272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 551890944.

It is not an unprimeable number, because it can be changed into a prime (551890949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 404824 + ... + 406184.

It is an arithmetic number, because the mean of its divisors is an integer number (11156142).

Almost surely, 2^551890944 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 551890944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (870179076).

551890944 is an abundant number, since it is smaller than the sum of its proper divisors (1188467208).

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

551890944 is a wasteful number, since it uses less digits than its factorization.

551890944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402 (or 1377 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 551890944 is about 23492.3592684941. The cubic root of 551890944 is about 820.2591605982.

The spelling of 551890944 in words is "five hundred fifty-one million, eight hundred ninety thousand, nine hundred forty-four".