42931764 has 18 divisors (see below), whose sum is σ = 108522050. Its totient is φ = 14310576.

The previous prime is 42931753. The next prime is 42931769. The reversal of 42931764 is 46713924.

It can be written as a sum of positive squares in only one way, i.e., 40068900 + 2862864 = 6330^2 + 1692^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1192549 = 42931764 / (4 + 2 + 9 + 3 + 1 + 7 + 6 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42931769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 596239 + ... + 596310.

Almost surely, 2^42931764 is an apocalyptic number.

It is an amenable number.

42931764 is an abundant number, since it is smaller than the sum of its proper divisors (65590286).

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

42931764 is a wasteful number, since it uses less digits than its factorization.

42931764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192559 (or 1192554 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 42931764 is about 6552.2335123223. The cubic root of 42931764 is about 350.1543917488.

The spelling of 42931764 in words is "forty-two million, nine hundred thirty-one thousand, seven hundred sixty-four".