75072990 has 32 divisors (see below), whose sum is σ = 189659520. Its totient is φ = 18965664.

The previous prime is 75072953. The next prime is 75073021. The reversal of 75072990 is 9927057.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 65284 + ... + 66423.

It is an arithmetic number, because the mean of its divisors is an integer number (5926860).

Almost surely, 2^75072990 is an apocalyptic number.

75072990 is an abundant number, since it is smaller than the sum of its proper divisors (114586530).

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

75072990 is a wasteful number, since it uses less digits than its factorization.

75072990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131736.

The product of its (nonzero) digits is 39690, while the sum is 39.

The square root of 75072990 is about 8664.4670926722. The cubic root of 75072990 is about 421.8530930737.

The spelling of 75072990 in words is "seventy-five million, seventy-two thousand, nine hundred ninety".