55723998 has 64 divisors (see below), whose sum is σ = 131546880. Its totient is φ = 15552000.

The previous prime is 55723973. The next prime is 55724027. The reversal of 55723998 is 89932755.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45798 + ... + 46998.

It is an arithmetic number, because the mean of its divisors is an integer number (2055420).

Almost surely, 2^55723998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55723998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65773440).

55723998 is an abundant number, since it is smaller than the sum of its proper divisors (75822882).

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

55723998 is a wasteful number, since it uses less digits than its factorization.

55723998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273.

The product of its digits is 680400, while the sum is 48.

The square root of 55723998 is about 7464.8508357502. The cubic root of 55723998 is about 381.9566620243.

The spelling of 55723998 in words is "fifty-five million, seven hundred twenty-three thousand, nine hundred ninety-eight".