78334479 has 16 divisors (see below), whose sum is σ = 116188000. Its totient is φ = 52161408.

The previous prime is 78334471. The next prime is 78334499. The reversal of 78334479 is 97443387.

It is a happy number.

It is not a de Polignac number, because 78334479 - 2³ = 78334471 is a prime.

It is a super-2 number, since 2×78334479² = 12272581200402882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78334471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40887 + ... + 42759.

It is an arithmetic number, because the mean of its divisors is an integer number (7261750).

Almost surely, 2^78334479 is an apocalyptic number.

78334479 is a deficient number, since it is larger than the sum of its proper divisors (37853521).

78334479 is a wasteful number, since it uses less digits than its factorization.

78334479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3431 (or 3425 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 78334479 is about 8850.6767537856. The cubic root of 78334479 is about 427.8757300002.

The spelling of 78334479 in words is "seventy-eight million, three hundred thirty-four thousand, four hundred seventy-nine".