78047788 has 36 divisors (see below), whose sum is σ = 171110352. Its totient is φ = 30875040.

The previous prime is 78047779. The next prime is 78047791. The reversal of 78047788 is 88774087.

It is a Harshad number since it is a multiple of its sum of digits (49).

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 11 ways as a sum of consecutive naturals, for example, 12768 + ... + 17863.

Almost surely, 2^78047788 is an apocalyptic number.

It is an amenable number.

78047788 is an abundant number, since it is smaller than the sum of its proper divisors (93062564).

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

78047788 is a wasteful number, since it uses less digits than its factorization.

78047788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30662 (or 30653 counting only the distinct ones).

The product of its (nonzero) digits is 702464, while the sum is 49.

The square root of 78047788 is about 8834.4659148134. The cubic root of 78047788 is about 427.3531075411.

The spelling of 78047788 in words is "seventy-eight million, forty-seven thousand, seven hundred eighty-eight".