75431970 has 24 divisors (see below), whose sum is σ = 196123356. Its totient is φ = 20115168.

The previous prime is 75431903. The next prime is 75431981. The reversal of 75431970 is 7913457.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75325041 + 106929 = 8679^2 + 327^2 .

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 Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 418977 + ... + 419156.

Almost surely, 2^75431970 is an apocalyptic number.

75431970 is an abundant number, since it is smaller than the sum of its proper divisors (120691386).

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

75431970 is a wasteful number, since it uses less digits than its factorization.

75431970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838146 (or 838143 counting only the distinct ones).

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

The square root of 75431970 is about 8685.1580296504. The cubic root of 75431970 is about 422.5244223363.

The spelling of 75431970 in words is "seventy-five million, four hundred thirty-one thousand, nine hundred seventy".