75139764 has 24 divisors (see below), whose sum is σ = 200372928. Its totient is φ = 21468480.

The previous prime is 75139747. The next prime is 75139769. The reversal of 75139764 is 46793157.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75139769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447177 + ... + 447344.

It is an arithmetic number, because the mean of its divisors is an integer number (8348872).

Almost surely, 2^75139764 is an apocalyptic number.

It is an amenable number.

75139764 is an abundant number, since it is smaller than the sum of its proper divisors (125233164).

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

75139764 is a wasteful number, since it uses less digits than its factorization.

75139764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894535 (or 894533 counting only the distinct ones).

The product of its digits is 158760, while the sum is 42.

The square root of 75139764 is about 8668.3195603300. The cubic root of 75139764 is about 421.9781290373.

The spelling of 75139764 in words is "seventy-five million, one hundred thirty-nine thousand, seven hundred sixty-four".