78194152 has 48 divisors (see below), whose sum is σ = 160917120. Its totient is φ = 35577600.

The previous prime is 78194119. The next prime is 78194153. The reversal of 78194152 is 25149187.

It is a super-2 number, since 2×78194152² = 12228650813998208, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (78194153) 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, 71127 + ... + 72217.

It is an arithmetic number, because the mean of its divisors is an integer number (3352440).

Almost surely, 2^78194152 is an apocalyptic number.

It is an amenable number.

78194152 is an abundant number, since it is smaller than the sum of its proper divisors (82722968).

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

78194152 is a wasteful number, since it uses less digits than its factorization.

78194152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162 (or 1141 counting only the distinct ones).

The product of its digits is 20160, while the sum is 37.

The square root of 78194152 is about 8842.7457274310. The cubic root of 78194152 is about 427.6200809463.

The spelling of 78194152 in words is "seventy-eight million, one hundred ninety-four thousand, one hundred fifty-two".