78434712 has 48 divisors (see below), whose sum is σ = 219286080. Its totient is φ = 25300800.

The previous prime is 78434711. The next prime is 78434729. The reversal of 78434712 is 21743487.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78434711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15339 + ... + 19802.

It is an arithmetic number, because the mean of its divisors is an integer number (4568460).

Almost surely, 2^78434712 is an apocalyptic number.

78434712 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78434712 is an abundant number, since it is smaller than the sum of its proper divisors (140851368).

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

78434712 is a wasteful number, since it uses less digits than its factorization.

78434712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35184 (or 35177 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 78434712 is about 8856.3373919471. The cubic root of 78434712 is about 428.0581485615.

The spelling of 78434712 in words is "seventy-eight million, four hundred thirty-four thousand, seven hundred twelve".