42157644 has 24 divisors (see below), whose sum is σ = 101541888. Its totient is φ = 13599120.

The previous prime is 42157607. The next prime is 42157651. The reversal of 42157644 is 44675124.

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, 56292 + ... + 57035.

It is an arithmetic number, because the mean of its divisors is an integer number (4230912).

Almost surely, 2^42157644 is an apocalyptic number.

It is an amenable number.

42157644 is an abundant number, since it is smaller than the sum of its proper divisors (59384244).

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

42157644 is a wasteful number, since it uses less digits than its factorization.

42157644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113365 (or 113363 counting only the distinct ones).

The product of its digits is 26880, while the sum is 33.

The square root of 42157644 is about 6492.8918056595. The cubic root of 42157644 is about 348.0370220885.

The spelling of 42157644 in words is "forty-two million, one hundred fifty-seven thousand, six hundred forty-four".