78274899 has 12 divisors (see below), whose sum is σ = 114184512. Its totient is φ = 51666000.

The previous prime is 78274879. The next prime is 78274901. The reversal of 78274899 is 99847287.

It is not a de Polignac number, because 78274899 - 2⁷ = 78274771 is a prime.

It is a super-2 number, since 2×78274899² = 12253919626920402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78274879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42147 + ... + 43964.

It is an arithmetic number, because the mean of its divisors is an integer number (9515376).

Almost surely, 2^78274899 is an apocalyptic number.

78274899 is a deficient number, since it is larger than the sum of its proper divisors (35909613).

78274899 is a wasteful number, since it uses less digits than its factorization.

78274899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86218 (or 86215 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 78274899 is about 8847.3102692287. The cubic root of 78274899 is about 427.7672239196.

The spelling of 78274899 in words is "seventy-eight million, two hundred seventy-four thousand, eight hundred ninety-nine".