78077604 has 48 divisors (see below), whose sum is σ = 199454976. Its totient is φ = 23575200.

The previous prime is 78077603. The next prime is 78077609. The reversal of 78077604 is 40677087.

It is a happy number.

It is a super-2 number, since 2×78077604² = 12192224492761632, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) 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 (78077603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42799 + ... + 44585.

It is an arithmetic number, because the mean of its divisors is an integer number (4155312).

Almost surely, 2^78077604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78077604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99727488).

78077604 is an abundant number, since it is smaller than the sum of its proper divisors (121377372).

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

78077604 is a wasteful number, since it uses less digits than its factorization.

78077604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136 (or 2134 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 78077604 is about 8836.1532354300. The cubic root of 78077604 is about 427.4075200933.

The spelling of 78077604 in words is "seventy-eight million, seventy-seven thousand, six hundred four".