78225042 has 16 divisors (see below), whose sum is σ = 178800192. Its totient is φ = 22350000.

The previous prime is 78225029. The next prime is 78225073. The reversal of 78225042 is 24052287.

It is a super-2 number, since 2×78225042² = 12238314391803528, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 931209 + ... + 931292.

It is an arithmetic number, because the mean of its divisors is an integer number (11175012).

Almost surely, 2^78225042 is an apocalyptic number.

78225042 is an abundant number, since it is smaller than the sum of its proper divisors (100575150).

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

78225042 is a wasteful number, since it uses less digits than its factorization.

78225042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862513.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 78225042 is about 8844.4921844049. The cubic root of 78225042 is about 427.6763828775.

The spelling of 78225042 in words is "seventy-eight million, two hundred twenty-five thousand, forty-two".