78755887 has 32 divisors (see below), whose sum is σ = 97920000. Its totient is φ = 63179424.

The previous prime is 78755881. The next prime is 78755939. The reversal of 78755887 is 78855787.

It is a de Polignac number, because none of the positive numbers 2^k-78755887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78755881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 528489 + ... + 528637.

It is an arithmetic number, because the mean of its divisors is an integer number (3060000).

Almost surely, 2^78755887 is an apocalyptic number.

78755887 is a deficient number, since it is larger than the sum of its proper divisors (19164113).

78755887 is a wasteful number, since it uses less digits than its factorization.

78755887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 246 counting only the distinct ones).

The product of its digits is 4390400, while the sum is 55.

The square root of 78755887 is about 8874.4513633238. The cubic root of 78755887 is about 428.6416246976.

The spelling of 78755887 in words is "seventy-eight million, seven hundred fifty-five thousand, eight hundred eighty-seven".