75428690 has 8 divisors (see below), whose sum is σ = 135771660. Its totient is φ = 30171472.

The previous prime is 75428671. The next prime is 75428701. The reversal of 75428690 is 9682457.

It can be written as a sum of positive squares in 2 ways, for example, as 71048041 + 4380649 = 8429^2 + 2093^2 .

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

It is a super-2 number, since 2×75428690² = 11378974550232200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3771425 + ... + 3771444.

Almost surely, 2^75428690 is an apocalyptic number.

75428690 is a deficient number, since it is larger than the sum of its proper divisors (60342970).

75428690 is a wasteful number, since it uses less digits than its factorization.

75428690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7542876.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 75428690 is about 8684.9691997151. The cubic root of 75428690 is about 422.5182980533.

The spelling of 75428690 in words is "seventy-five million, four hundred twenty-eight thousand, six hundred ninety".