42724624 has 20 divisors (see below), whose sum is σ = 84799260. Its totient is φ = 20840960.

The previous prime is 42724609. The next prime is 42724657. The reversal of 42724624 is 42642724.

It can be written as a sum of positive squares in 2 ways, for example, as 2782224 + 39942400 = 1668^2 + 6320^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31909 + ... + 33220.

It is an arithmetic number, because the mean of its divisors is an integer number (4239963).

Almost surely, 2^42724624 is an apocalyptic number.

It is an amenable number.

42724624 is a deficient number, since it is larger than the sum of its proper divisors (42074636).

42724624 is a wasteful number, since it uses less digits than its factorization.

42724624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65178 (or 65172 counting only the distinct ones).

The product of its digits is 21504, while the sum is 31.

The square root of 42724624 is about 6536.4075760313. The cubic root of 42724624 is about 349.5903342897.

The spelling of 42724624 in words is "forty-two million, seven hundred twenty-four thousand, six hundred twenty-four".