78112734 has 16 divisors (see below), whose sum is σ = 178543488. Its totient is φ = 22317912.

The previous prime is 78112733. The next prime is 78112759. The reversal of 78112734 is 43721187.

It is a happy number.

It is a super-2 number, since 2×78112734² = 12203198425909512, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78112695 and 78112704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78112733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 929872 + ... + 929955.

It is an arithmetic number, because the mean of its divisors is an integer number (11158968).

Almost surely, 2^78112734 is an apocalyptic number.

78112734 is an abundant number, since it is smaller than the sum of its proper divisors (100430754).

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

78112734 is a wasteful number, since it uses less digits than its factorization.

78112734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1859839.

The product of its digits is 9408, while the sum is 33.

The square root of 78112734 is about 8838.1408678522. The cubic root of 78112734 is about 427.4716126289.

The spelling of 78112734 in words is "seventy-eight million, one hundred twelve thousand, seven hundred thirty-four".