75030978 has 16 divisors (see below), whose sum is σ = 163704096. Its totient is φ = 22736640.

The previous prime is 75030959. The next prime is 75031003. The reversal of 75030978 is 87903057.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 568351 + ... + 568482.

It is an arithmetic number, because the mean of its divisors is an integer number (10231506).

Almost surely, 2^75030978 is an apocalyptic number.

75030978 is an abundant number, since it is smaller than the sum of its proper divisors (88673118).

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

75030978 is a wasteful number, since it uses less digits than its factorization.

75030978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136849.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 75030978 is about 8662.0423688643. The cubic root of 75030978 is about 421.7743865634.

The spelling of 75030978 in words is "seventy-five million, thirty thousand, nine hundred seventy-eight".