75150978 has 16 divisors (see below), whose sum is σ = 171773760. Its totient is φ = 21471696.

The previous prime is 75150961. The next prime is 75150983. The reversal of 75150978 is 87905157.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1789309 = 75150978 / (7 + 5 + 1 + 5 + 0 + 9 + 7 + 8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 894613 + ... + 894696.

It is an arithmetic number, because the mean of its divisors is an integer number (10735860).

Almost surely, 2^75150978 is an apocalyptic number.

75150978 is an abundant number, since it is smaller than the sum of its proper divisors (96622782).

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

75150978 is a wasteful number, since it uses less digits than its factorization.

75150978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789321.

The product of its (nonzero) digits is 88200, while the sum is 42.

The square root of 75150978 is about 8668.9663743724. The cubic root of 75150978 is about 421.9991202635. Note that the first 3 decimals are identical.

The spelling of 75150978 in words is "seventy-five million, one hundred fifty thousand, nine hundred seventy-eight".