42640944 has 40 divisors (see below), whose sum is σ = 111808320. Its totient is φ = 14000448.

The previous prime is 42640937. The next prime is 42640951. The reversal of 42640944 is 44904624.

It is an interprime number because it is at equal distance from previous prime (42640937) and next prime (42640951).

It is a super-2 number, since 2×42640944² = 3636500210422272, which contains 22 as substring.

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, 3414 + ... + 9845.

It is an arithmetic number, because the mean of its divisors is an integer number (2795208).

Almost surely, 2^42640944 is an apocalyptic number.

It is an amenable number.

42640944 is an abundant number, since it is smaller than the sum of its proper divisors (69167376).

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

42640944 is a wasteful number, since it uses less digits than its factorization.

42640944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13337 (or 13331 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 42640944 is about 6530.0033690650. The cubic root of 42640944 is about 349.3619504685.

The spelling of 42640944 in words is "forty-two million, six hundred forty thousand, nine hundred forty-four".