78923400 has 96 divisors (see below), whose sum is σ = 246264000. Its totient is φ = 20908800.

The previous prime is 78923399. The next prime is 78923417. The reversal of 78923400 is 432987.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119070 + ... + 119730.

It is an arithmetic number, because the mean of its divisors is an integer number (2565250).

Almost surely, 2^78923400 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 78923400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123132000).

78923400 is an abundant number, since it is smaller than the sum of its proper divisors (167340600).

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

78923400 is a wasteful number, since it uses less digits than its factorization.

78923400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879 (or 870 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 78923400 is about 8883.8842856039. The cubic root of 78923400 is about 428.9453149959.

The spelling of 78923400 in words is "seventy-eight million, nine hundred twenty-three thousand, four hundred".