75990978 has 24 divisors (see below), whose sum is σ = 188168448. Its totient is φ = 21711672.

The previous prime is 75990949. The next prime is 75990979. The reversal of 75990978 is 87909957.

It is not an unprimeable number, because it can be changed into a prime (75990979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 301426 + ... + 301677.

It is an arithmetic number, because the mean of its divisors is an integer number (7840352).

Almost surely, 2^75990978 is an apocalyptic number.

75990978 is an abundant number, since it is smaller than the sum of its proper divisors (112177470).

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

75990978 is a wasteful number, since it uses less digits than its factorization.

75990978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603118 (or 603115 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 54.

The square root of 75990978 is about 8717.2804245361. The cubic root of 75990978 is about 423.5655965340.

The spelling of 75990978 in words is "seventy-five million, nine hundred ninety thousand, nine hundred seventy-eight".