78578802 has 48 divisors (see below), whose sum is σ = 179002080. Its totient is φ = 25551288.

The previous prime is 78578789. The next prime is 78578809. The reversal of 78578802 is 20887587.

It is a happy number.

78578802 is a `hidden beast` number, since 78 + 578 + 8 + 0 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (78578809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99453 + ... + 100239.

It is an arithmetic number, because the mean of its divisors is an integer number (3729210).

Almost surely, 2^78578802 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78578802, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89501040).

78578802 is an abundant number, since it is smaller than the sum of its proper divisors (100423278).

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

78578802 is a wasteful number, since it uses less digits than its factorization.

78578802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884 (or 835 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The square root of 78578802 is about 8864.4685119865. The cubic root of 78578802 is about 428.3201123701.

The spelling of 78578802 in words is "seventy-eight million, five hundred seventy-eight thousand, eight hundred two".