42537816 has 48 divisors (see below), whose sum is σ = 115830000. Its totient is φ = 14102592.

The previous prime is 42537799. The next prime is 42537821. The reversal of 42537816 is 61873524.

42537816 is a `hidden beast` number, since 42 + 537 + 81 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12685 + ... + 15683.

It is an arithmetic number, because the mean of its divisors is an integer number (2413125).

Almost surely, 2^42537816 is an apocalyptic number.

It is an amenable number.

42537816 is an abundant number, since it is smaller than the sum of its proper divisors (73292184).

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

42537816 is a wasteful number, since it uses less digits than its factorization.

42537816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208 (or 3201 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 42537816 is about 6522.1021151160. The cubic root of 42537816 is about 349.0800767531.

The spelling of 42537816 in words is "forty-two million, five hundred thirty-seven thousand, eight hundred sixteen".