75197990 has 32 divisors (see below), whose sum is σ = 157619520. Its totient is φ = 25294464.

The previous prime is 75197951. The next prime is 75198001. The reversal of 75197990 is 9979157.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6425 + ... + 13844.

It is an arithmetic number, because the mean of its divisors is an integer number (4925610).

Almost surely, 2^75197990 is an apocalyptic number.

75197990 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

75197990 is an abundant number, since it is smaller than the sum of its proper divisors (82421530).

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

75197990 is a wasteful number, since it uses less digits than its factorization.

75197990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20336.

The product of its (nonzero) digits is 178605, while the sum is 47.

The square root of 75197990 is about 8671.6774617141. The cubic root of 75197990 is about 422.0870982146.

The spelling of 75197990 in words is "seventy-five million, one hundred ninety-seven thousand, nine hundred ninety".