75172390 has 8 divisors (see below), whose sum is σ = 135310320. Its totient is φ = 30068952.

The previous prime is 75172367. The next prime is 75172397. The reversal of 75172390 is 9327157.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75172397) 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, 3758610 + ... + 3758629.

It is an arithmetic number, because the mean of its divisors is an integer number (16913790).

Almost surely, 2^75172390 is an apocalyptic number.

75172390 is a deficient number, since it is larger than the sum of its proper divisors (60137930).

75172390 is a wasteful number, since it uses less digits than its factorization.

75172390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7517246.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 75172390 is about 8670.2012664067. The cubic root of 75172390 is about 422.0391950897.

The spelling of 75172390 in words is "seventy-five million, one hundred seventy-two thousand, three hundred ninety".