55990730 has 16 divisors (see below), whose sum is σ = 103127904. Its totient is φ = 21875280.

The previous prime is 55990723. The next prime is 55990747. The reversal of 55990730 is 3709955.

It is a Curzon number.

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, 64676 + ... + 65535.

It is an arithmetic number, because the mean of its divisors is an integer number (6445494).

Almost surely, 2^55990730 is an apocalyptic number.

55990730 is a deficient number, since it is larger than the sum of its proper divisors (47137174).

55990730 is a wasteful number, since it uses less digits than its factorization.

55990730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130261.

The product of its (nonzero) digits is 42525, while the sum is 38.

The square root of 55990730 is about 7482.6953699853. The cubic root of 55990730 is about 382.5651248275.

The spelling of 55990730 in words is "fifty-five million, nine hundred ninety thousand, seven hundred thirty".