55290786 has 16 divisors (see below), whose sum is σ = 110725824. Its totient is φ = 18406224.

The previous prime is 55290769. The next prime is 55290793. The reversal of 55290786 is 68709255.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 661 + ... + 10536.

It is an arithmetic number, because the mean of its divisors is an integer number (6920364).

Almost surely, 2^55290786 is an apocalyptic number.

55290786 is an abundant number, since it is smaller than the sum of its proper divisors (55435038).

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

55290786 is a wasteful number, since it uses less digits than its factorization.

55290786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12025.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 55290786 is about 7435.7774307735. Note that the first 3 decimals coincide. The cubic root of 55290786 is about 380.9642776905.

The spelling of 55290786 in words is "fifty-five million, two hundred ninety thousand, seven hundred eighty-six".