74999978 has 8 divisors (see below), whose sum is σ = 112790340. Its totient is φ = 37403200.

The previous prime is 74999959. The next prime is 75000007. The reversal of 74999978 is 87999947.

It can be written as a sum of positive squares in 2 ways, for example, as 57047809 + 17952169 = 7553^2 + 4237^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 74999978.

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, 47423 + ... + 48978.

Almost surely, 2^74999978 is an apocalyptic number.

74999978 is a deficient number, since it is larger than the sum of its proper divisors (37790362).

74999978 is a wasteful number, since it uses less digits than its factorization.

74999978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96792.

The product of its digits is 10287648, while the sum is 62.

The square root of 74999978 is about 8660.2527676737. The cubic root of 74999978 is about 421.7162914164.

The spelling of 74999978 in words is "seventy-four million, nine hundred ninety-nine thousand, nine hundred seventy-eight".