78434774 has 32 divisors (see below), whose sum is σ = 139484160. Its totient is φ = 32680800.

The previous prime is 78434771. The next prime is 78434791. The reversal of 78434774 is 47743487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78434771) 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, 9932 + ... + 15984.

It is an arithmetic number, because the mean of its divisors is an integer number (4358880).

Almost surely, 2^78434774 is an apocalyptic number.

78434774 is a deficient number, since it is larger than the sum of its proper divisors (61049386).

78434774 is a wasteful number, since it uses less digits than its factorization.

78434774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6116.

The product of its digits is 526848, while the sum is 44.

The square root of 78434774 is about 8856.3408922647. The cubic root of 78434774 is about 428.0582613500.

The spelling of 78434774 in words is "seventy-eight million, four hundred thirty-four thousand, seven hundred seventy-four".