78501904 has 40 divisors (see below), whose sum is σ = 166911192. Its totient is φ = 35543040.

The previous prime is 78501877. The next prime is 78501949. The reversal of 78501904 is 40910587.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2304 + 78499600 = 48^2 + 8860^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78501904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7464 + ... + 14584.

Almost surely, 2^78501904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78501904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83455596).

78501904 is an abundant number, since it is smaller than the sum of its proper divisors (88409288).

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

78501904 is a wasteful number, since it uses less digits than its factorization.

78501904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7195 (or 7189 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 78501904 is about 8860.1300216193. The cubic root of 78501904 is about 428.1803473226.

The spelling of 78501904 in words is "seventy-eight million, five hundred one thousand, nine hundred four".