78320802 has 64 divisors (see below), whose sum is σ = 194033664. Its totient is φ = 20563200.

The previous prime is 78320791. The next prime is 78320821. The reversal of 78320802 is 20802387.

It is a super-2 number, since 2×78320802² = 12268296051846408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78320802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29427 + ... + 31977.

It is an arithmetic number, because the mean of its divisors is an integer number (3031776).

Almost surely, 2^78320802 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78320802, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97016832).

78320802 is an abundant number, since it is smaller than the sum of its proper divisors (115712862).

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

78320802 is a wasteful number, since it uses less digits than its factorization.

78320802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 78320802 is about 8849.9040672767. The cubic root of 78320802 is about 427.8508265475.

The spelling of 78320802 in words is "seventy-eight million, three hundred twenty thousand, eight hundred two".