75149920 has 24 divisors (see below), whose sum is σ = 177542064. Its totient is φ = 30059904.

The previous prime is 75149903. The next prime is 75149929. The reversal of 75149920 is 2994157.

It is a self number, because there is not a number n which added to its sum of digits gives 75149920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75149929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234684 + ... + 235003.

It is an arithmetic number, because the mean of its divisors is an integer number (7397586).

Almost surely, 2^75149920 is an apocalyptic number.

It is an amenable number.

75149920 is an abundant number, since it is smaller than the sum of its proper divisors (102392144).

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

75149920 is a wasteful number, since it uses less digits than its factorization.

75149920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469702 (or 469694 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 75149920 is about 8668.9053518884. The cubic root of 75149920 is about 421.9971399071.

The spelling of 75149920 in words is "seventy-five million, one hundred forty-nine thousand, nine hundred twenty".