78199392 has 24 divisors (see below), whose sum is σ = 205273656. Its totient is φ = 26066432.

The previous prime is 78199349. The next prime is 78199393. The reversal of 78199392 is 29399187.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×78199392² = 12230289818339328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78199393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407193 + ... + 407384.

It is an arithmetic number, because the mean of its divisors is an integer number (8553069).

Almost surely, 2^78199392 is an apocalyptic number.

It is an amenable number.

78199392 is an abundant number, since it is smaller than the sum of its proper divisors (127074264).

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

78199392 is a wasteful number, since it uses less digits than its factorization.

78199392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814590 (or 814582 counting only the distinct ones).

The product of its digits is 244944, while the sum is 48.

The square root of 78199392 is about 8843.0420105301. The cubic root of 78199392 is about 427.6296327228.

The spelling of 78199392 in words is "seventy-eight million, one hundred ninety-nine thousand, three hundred ninety-two".