78222894 has 24 divisors (see below), whose sum is σ = 157997112. Its totient is φ = 25818240.

The previous prime is 78222883. The next prime is 78222953. The reversal of 78222894 is 49822287.

It is a super-2 number, since 2×78222894² = 12237642291470472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76104 + ... + 77124.

It is an arithmetic number, because the mean of its divisors is an integer number (6583213).

Almost surely, 2^78222894 is an apocalyptic number.

78222894 is an abundant number, since it is smaller than the sum of its proper divisors (79774218).

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

78222894 is a wasteful number, since it uses less digits than its factorization.

78222894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252 (or 1139 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 78222894 is about 8844.3707520660. The cubic root of 78222894 is about 427.6724682859.

The spelling of 78222894 in words is "seventy-eight million, two hundred twenty-two thousand, eight hundred ninety-four".