78892086 has 128 divisors (see below), whose sum is σ = 206438400. Its totient is φ = 19543680.

The previous prime is 78892069. The next prime is 78892133. The reversal of 78892086 is 68029887.

It is a happy number.

It is a super-2 number, since 2×78892086² = 12447922466862792, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 998595 + ... + 998673.

It is an arithmetic number, because the mean of its divisors is an integer number (1612800).

Almost surely, 2^78892086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78892086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103219200).

78892086 is an abundant number, since it is smaller than the sum of its proper divisors (127546314).

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

78892086 is a wasteful number, since it uses less digits than its factorization.

78892086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194.

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 78892086 is about 8882.1217059889. The cubic root of 78892086 is about 428.8885774063. Note that the first 3 decimals are identical.

The spelling of 78892086 in words is "seventy-eight million, eight hundred ninety-two thousand, eighty-six".