42008724 has 36 divisors (see below), whose sum is σ = 107540160. Its totient is φ = 13824720.

The previous prime is 42008693. The next prime is 42008749. The reversal of 42008724 is 42780024.

It is a tau number, because it is divible by the number of its divisors (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, 4542 + ... + 10229.

Almost surely, 2^42008724 is an apocalyptic number.

It is an amenable number.

42008724 is an abundant number, since it is smaller than the sum of its proper divisors (65531436).

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

42008724 is a wasteful number, since it uses less digits than its factorization.

42008724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14860 (or 14855 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 42008724 is about 6481.4137346724. The cubic root of 42008724 is about 347.6267301688.

Adding to 42008724 its reverse (42780024), we get a palindrome (84788748).

The spelling of 42008724 in words is "forty-two million, eight thousand, seven hundred twenty-four".