42238520 has 64 divisors (see below), whose sum is σ = 100980000. Its totient is φ = 15856128.

The previous prime is 42238519. The next prime is 42238541. The reversal of 42238520 is 2583224.

It is a self number, because there is not a number n which added to its sum of digits gives 42238520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113054 + ... + 113426.

Almost surely, 2^42238520 is an apocalyptic number.

42238520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42238520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50490000).

42238520 is an abundant number, since it is smaller than the sum of its proper divisors (58741480).

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

42238520 is a wasteful number, since it uses less digits than its factorization.

42238520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 42238520 is about 6499.1168630822. The cubic root of 42238520 is about 348.2594401279.

The spelling of 42238520 in words is "forty-two million, two hundred thirty-eight thousand, five hundred twenty".