78396142 has 12 divisors (see below), whose sum is σ = 129256848. Its totient is φ = 35634500.

The previous prime is 78396137. The next prime is 78396151. The reversal of 78396142 is 24169387.

It is a super-2 number, since 2×78396142² = 12291910160968328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78396095 and 78396104.

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, 161734 + ... + 162217.

It is an arithmetic number, because the mean of its divisors is an integer number (10771404).

Almost surely, 2^78396142 is an apocalyptic number.

78396142 is a deficient number, since it is larger than the sum of its proper divisors (50860706).

78396142 is a wasteful number, since it uses less digits than its factorization.

78396142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323975 (or 323964 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 78396142 is about 8854.1595874482. The cubic root of 78396142 is about 427.9879716828.

The spelling of 78396142 in words is "seventy-eight million, three hundred ninety-six thousand, one hundred forty-two".