42631998 has 16 divisors (see below), whose sum is σ = 85789056. Its totient is φ = 14123160.

The previous prime is 42631997. The next prime is 42632003. The reversal of 42631998 is 89913624.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42631997) 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, 20818 + ... + 22773.

It is an arithmetic number, because the mean of its divisors is an integer number (5361816).

Almost surely, 2^42631998 is an apocalyptic number.

42631998 is an abundant number, since it is smaller than the sum of its proper divisors (43157058).

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

42631998 is a wasteful number, since it uses less digits than its factorization.

42631998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43759.

The product of its digits is 93312, while the sum is 42.

The square root of 42631998 is about 6529.3183411440. The cubic root of 42631998 is about 349.3375169053.

The spelling of 42631998 in words is "forty-two million, six hundred thirty-one thousand, nine hundred ninety-eight".