42279990 has 32 divisors (see below), whose sum is σ = 103196160. Its totient is φ = 11083104.

The previous prime is 42279977. The next prime is 42280009. The reversal of 42279990 is 9997224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10174 + ... + 13713.

It is an arithmetic number, because the mean of its divisors is an integer number (3224880).

Almost surely, 2^42279990 is an apocalyptic number.

42279990 is an abundant number, since it is smaller than the sum of its proper divisors (60916170).

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

42279990 is a wasteful number, since it uses less digits than its factorization.

42279990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23956.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 42279990 is about 6502.3065138457. The cubic root of 42279990 is about 348.3733771617.

The spelling of 42279990 in words is "forty-two million, two hundred seventy-nine thousand, nine hundred ninety".