78885394 has 48 divisors (see below), whose sum is σ = 146081880. Its totient is φ = 31799040.

The previous prime is 78885341. The next prime is 78885403. The reversal of 78885394 is 49358887.

It can be written as a sum of positive squares in 4 ways, for example, as 71622369 + 7263025 = 8463^2 + 2695^2 .

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

Its product of digits (1935360) is a multiple of the sum of its prime divisors (756).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116184 + ... + 116860.

Almost surely, 2^78885394 is an apocalyptic number.

78885394 is a deficient number, since it is larger than the sum of its proper divisors (67196486).

78885394 is a wasteful number, since it uses less digits than its factorization.

78885394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763 (or 756 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 52.

The square root of 78885394 is about 8881.7449862063. The cubic root of 78885394 is about 428.8764502773.

The spelling of 78885394 in words is "seventy-eight million, eight hundred eighty-five thousand, three hundred ninety-four".