75189990 has 32 divisors (see below), whose sum is σ = 188303616. Its totient is φ = 19178720.

The previous prime is 75189979. The next prime is 75189991. The reversal of 75189990 is 9998157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75189991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53796 + ... + 55175.

It is an arithmetic number, because the mean of its divisors is an integer number (5884488).

Almost surely, 2^75189990 is an apocalyptic number.

75189990 is an abundant number, since it is smaller than the sum of its proper divisors (113113626).

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

75189990 is a wasteful number, since it uses less digits than its factorization.

75189990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109004.

The product of its (nonzero) digits is 204120, while the sum is 48.

The square root of 75189990 is about 8671.2161776766. The cubic root of 75189990 is about 422.0721296561.

The spelling of 75189990 in words is "seventy-five million, one hundred eighty-nine thousand, nine hundred ninety".