78161422 has 16 divisors (see below), whose sum is σ = 118761552. Its totient is φ = 38577280.

The previous prime is 78161417. The next prime is 78161431. The reversal of 78161422 is 22416187.

It is a super-2 number, since 2×78161422² = 12218415778124168, 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71097 + ... + 72187.

It is an arithmetic number, because the mean of its divisors is an integer number (7422597).

Almost surely, 2^78161422 is an apocalyptic number.

78161422 is a deficient number, since it is larger than the sum of its proper divisors (40600130).

78161422 is a wasteful number, since it uses less digits than its factorization.

78161422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523.

The product of its digits is 5376, while the sum is 31.

The square root of 78161422 is about 8840.8948642092. The cubic root of 78161422 is about 427.5604091417.

The spelling of 78161422 in words is "seventy-eight million, one hundred sixty-one thousand, four hundred twenty-two".