55990772 has 6 divisors (see below), whose sum is σ = 97983858. Its totient is φ = 27995384.

The previous prime is 55990751. The next prime is 55990787. The reversal of 55990772 is 27709955.

It can be written as a sum of positive squares in only one way, i.e., 36312676 + 19678096 = 6026^2 + 4436^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6998843 + ... + 6998850.

It is an arithmetic number, because the mean of its divisors is an integer number (16330643).

Almost surely, 2^55990772 is an apocalyptic number.

It is an amenable number.

55990772 is a deficient number, since it is larger than the sum of its proper divisors (41993086).

55990772 is a wasteful number, since it uses less digits than its factorization.

55990772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13997697 (or 13997695 counting only the distinct ones).

The product of its (nonzero) digits is 198450, while the sum is 44.

The square root of 55990772 is about 7482.6981764601. The cubic root of 55990772 is about 382.5652204846.

The spelling of 55990772 in words is "fifty-five million, nine hundred ninety thousand, seven hundred seventy-two".