42238764 has 72 divisors (see below), whose sum is σ = 112519680. Its totient is φ = 13334112.

The previous prime is 42238753. The next prime is 42238789. The reversal of 42238764 is 46783224.

It is a super-2 number, since 2×42238764² = 3568226368495392, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114909 + ... + 115275.

Almost surely, 2^42238764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42238764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56259840).

42238764 is an abundant number, since it is smaller than the sum of its proper divisors (70280916).

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

42238764 is a wasteful number, since it uses less digits than its factorization.

42238764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 534 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 42238764 is about 6499.1356348364. The cubic root of 42238764 is about 348.2601107254.

The spelling of 42238764 in words is "forty-two million, two hundred thirty-eight thousand, seven hundred sixty-four".