78157112 has 32 divisors (see below), whose sum is σ = 160913520. Its totient is φ = 35293440.

The previous prime is 78157103. The next prime is 78157129. The reversal of 78157112 is 21175187.

It is a super-2 number, since 2×78157112² = 12217068312361088, 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, 10988 + ... + 16644.

Almost surely, 2^78157112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78157112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80456760).

78157112 is an abundant number, since it is smaller than the sum of its proper divisors (82756408).

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

78157112 is a wasteful number, since it uses less digits than its factorization.

78157112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5831 (or 5827 counting only the distinct ones).

The product of its digits is 3920, while the sum is 32.

The square root of 78157112 is about 8840.6511072432. The cubic root of 78157112 is about 427.5525501102.

The spelling of 78157112 in words is "seventy-eight million, one hundred fifty-seven thousand, one hundred twelve".