55936890 has 24 divisors (see below), whose sum is σ = 145436148. Its totient is φ = 14916480.

The previous prime is 55936883. The next prime is 55936891. The reversal of 55936890 is 9863955.

55936890 is a `hidden beast` number, since 559 + 3 + 6 + 8 + 90 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 52577001 + 3359889 = 7251^2 + 1833^2 .

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

It is not an unprimeable number, because it can be changed into a prime (55936891) 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, 310671 + ... + 310850.

Almost surely, 2^55936890 is an apocalyptic number.

55936890 is an abundant number, since it is smaller than the sum of its proper divisors (89499258).

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

55936890 is a wasteful number, since it uses less digits than its factorization.

55936890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621534 (or 621531 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 55936890 is about 7479.0968706121. The cubic root of 55936890 is about 382.4424621898.

The spelling of 55936890 in words is "fifty-five million, nine hundred thirty-six thousand, eight hundred ninety".