78222204 has 18 divisors (see below), whose sum is σ = 197728440. Its totient is φ = 26074056.

The previous prime is 78222197. The next prime is 78222211. The reversal of 78222204 is 40222287.

It is an interprime number because it is at equal distance from previous prime (78222197) and next prime (78222211).

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×78222204² = 12237426397235232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1086384 + ... + 1086455.

Almost surely, 2^78222204 is an apocalyptic number.

It is an amenable number.

78222204 is an abundant number, since it is smaller than the sum of its proper divisors (119506236).

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

78222204 is a wasteful number, since it uses less digits than its factorization.

78222204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172849 (or 2172844 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 78222204 is about 8844.3317441172. The cubic root of 78222204 is about 427.6712107901.

The spelling of 78222204 in words is "seventy-eight million, two hundred twenty-two thousand, two hundred four".