78023800 has 24 divisors (see below), whose sum is σ = 181405800. Its totient is φ = 31209440.

The previous prime is 78023753. The next prime is 78023837. The reversal of 78023800 is 832087.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 194860 + ... + 195259.

It is an arithmetic number, because the mean of its divisors is an integer number (7558575).

Almost surely, 2^78023800 is an apocalyptic number.

It is an amenable number.

78023800 is an abundant number, since it is smaller than the sum of its proper divisors (103382000).

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

78023800 is a wasteful number, since it uses less digits than its factorization.

78023800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390135 (or 390126 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 78023800 is about 8833.1081732310. The cubic root of 78023800 is about 427.3093207064.

Adding to 78023800 its reverse (832087), we get a palindrome (78855887).

The spelling of 78023800 in words is "seventy-eight million, twenty-three thousand, eight hundred".