56001998 has 16 divisors (see below), whose sum is σ = 90726720. Its totient is φ = 25772256.

The previous prime is 56001989. The next prime is 56002007. The reversal of 56001998 is 89910065.

It is an interprime number because it is at equal distance from previous prime (56001989) and next prime (56002007).

56001998 is a modest number, since divided by 1998 gives 56 as remainder.

It is a congruent 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, 6608 + ... + 12476.

It is an arithmetic number, because the mean of its divisors is an integer number (5670420).

Almost surely, 2^56001998 is an apocalyptic number.

56001998 is a deficient number, since it is larger than the sum of its proper divisors (34724722).

56001998 is a wasteful number, since it uses less digits than its factorization.

56001998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6251.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 56001998 is about 7483.4482693475. The cubic root of 56001998 is about 382.5907865438.

The spelling of 56001998 in words is "fifty-six million, one thousand, nine hundred ninety-eight".