56643198 has 16 divisors (see below), whose sum is σ = 114114960. Its totient is φ = 18742976.

The previous prime is 56643193. The next prime is 56643203. The reversal of 56643198 is 89134665.

It is an interprime number because it is at equal distance from previous prime (56643193) and next prime (56643203).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56643193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33633 + ... + 35276.

It is an arithmetic number, because the mean of its divisors is an integer number (7132185).

Almost surely, 2^56643198 is an apocalyptic number.

56643198 is an abundant number, since it is smaller than the sum of its proper divisors (57471762).

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

56643198 is a wasteful number, since it uses less digits than its factorization.

56643198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69051.

The product of its digits is 155520, while the sum is 42.

The square root of 56643198 is about 7526.1675506196. The cubic root of 56643198 is about 384.0454183475.

The spelling of 56643198 in words is "fifty-six million, six hundred forty-three thousand, one hundred ninety-eight".