78001788 has 12 divisors (see below), whose sum is σ = 182004200. Its totient is φ = 26000592.

The previous prime is 78001787. The next prime is 78001837. The reversal of 78001788 is 88710087.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78001787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3250063 + ... + 3250086.

Almost surely, 2^78001788 is an apocalyptic number.

It is an amenable number.

78001788 is an abundant number, since it is smaller than the sum of its proper divisors (104002412).

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

78001788 is a wasteful number, since it uses less digits than its factorization.

78001788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6500156 (or 6500154 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 39.

The square root of 78001788 is about 8831.8620913146. The cubic root of 78001788 is about 427.2691328943.

The spelling of 78001788 in words is "seventy-eight million, one thousand, seven hundred eighty-eight".