78734238 has 32 divisors (see below), whose sum is σ = 173404800. Its totient is φ = 23633760.

The previous prime is 78734213. The next prime is 78734239. The reversal of 78734238 is 83243787.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78734238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78734239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1488 + ... + 12636.

It is an arithmetic number, because the mean of its divisors is an integer number (5418900).

Almost surely, 2^78734238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78734238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86702400).

78734238 is an abundant number, since it is smaller than the sum of its proper divisors (94670562).

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

78734238 is a wasteful number, since it uses less digits than its factorization.

78734238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11272.

The product of its digits is 225792, while the sum is 42.

The square root of 78734238 is about 8873.2315421159. The cubic root of 78734238 is about 428.6023450395.

The spelling of 78734238 in words is "seventy-eight million, seven hundred thirty-four thousand, two hundred thirty-eight".