78097500 has 240 divisors, whose sum is σ = 275536800. Its totient is φ = 19008000.

The previous prime is 78097483. The next prime is 78097561. The reversal of 78097500 is 579087.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 877456 + ... + 877544.

It is an arithmetic number, because the mean of its divisors is an integer number (1148070).

Almost surely, 2^78097500 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 78097500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137768400).

78097500 is an abundant number, since it is smaller than the sum of its proper divisors (197439300).

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

78097500 is a wasteful number, since it uses less digits than its factorization.

78097500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 78097500 is about 8837.2789929933. The cubic root of 78097500 is about 427.4438214882.

The spelling of 78097500 in words is "seventy-eight million, ninety-seven thousand, five hundred".