78274887 has 16 divisors (see below), whose sum is σ = 107153280. Its totient is φ = 50807072.

The previous prime is 78274879. The next prime is 78274901. The reversal of 78274887 is 78847287.

It is a cyclic number.

It is not a de Polignac number, because 78274887 - 2³ = 78274879 is a prime.

It is a super-2 number, since 2×78274887² = 12253915869725538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78274837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16873 + ... + 21005.

It is an arithmetic number, because the mean of its divisors is an integer number (6697080).

Almost surely, 2^78274887 is an apocalyptic number.

78274887 is a deficient number, since it is larger than the sum of its proper divisors (28878393).

78274887 is a wasteful number, since it uses less digits than its factorization.

78274887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4302.

The product of its digits is 1404928, while the sum is 51.

The square root of 78274887 is about 8847.3095910565. The cubic root of 78274887 is about 427.7672020598.

The spelling of 78274887 in words is "seventy-eight million, two hundred seventy-four thousand, eight hundred eighty-seven".