78232142 has 4 divisors (see below), whose sum is σ = 117348216. Its totient is φ = 39116070.

The previous prime is 78232117. The next prime is 78232183. The reversal of 78232142 is 24123287.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×78232142² = 12240536083816328, 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 as a sum of consecutive naturals, namely, 19558034 + ... + 19558037.

It is an arithmetic number, because the mean of its divisors is an integer number (29337054).

Almost surely, 2^78232142 is an apocalyptic number.

78232142 is a deficient number, since it is larger than the sum of its proper divisors (39116074).

78232142 is a wasteful number, since it uses less digits than its factorization.

78232142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39116073.

The product of its digits is 5376, while the sum is 29.

The square root of 78232142 is about 8844.8935550407. The cubic root of 78232142 is about 427.6893216602.

The spelling of 78232142 in words is "seventy-eight million, two hundred thirty-two thousand, one hundred forty-two".