75921372 has 18 divisors (see below), whose sum is σ = 191912448. Its totient is φ = 25307112.

The previous prime is 75921343. The next prime is 75921379. The reversal of 75921372 is 27312957.

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

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: 2108927 = 75921372 / (7 + 5 + 9 + 2 + 1 + 3 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75921379) 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, 1054428 + ... + 1054499.

Almost surely, 2^75921372 is an apocalyptic number.

It is an amenable number.

75921372 is an abundant number, since it is smaller than the sum of its proper divisors (115991076).

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

75921372 is a wasteful number, since it uses less digits than its factorization.

75921372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108937 (or 2108932 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 75921372 is about 8713.2870950061. The cubic root of 75921372 is about 423.4362315571.

The spelling of 75921372 in words is "seventy-five million, nine hundred twenty-one thousand, three hundred seventy-two".