78461392 has 20 divisors (see below), whose sum is σ = 160961796. Its totient is φ = 36922880.

The previous prime is 78461389. The next prime is 78461399. The reversal of 78461392 is 29316487.

It can be written as a sum of positive squares in 2 ways, for example, as 23464336 + 54997056 = 4844^2 + 7416^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78461399) 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 3 ways as a sum of consecutive naturals, for example, 143959 + ... + 144502.

Almost surely, 2^78461392 is an apocalyptic number.

It is an amenable number.

78461392 is an abundant number, since it is smaller than the sum of its proper divisors (82500404).

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

78461392 is a wasteful number, since it uses less digits than its factorization.

78461392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288486 (or 288480 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 78461392 is about 8857.8435298892. The cubic root of 78461392 is about 428.1066785063.

The spelling of 78461392 in words is "seventy-eight million, four hundred sixty-one thousand, three hundred ninety-two".