78321152 has 120 divisors (see below), whose sum is σ = 197414448. Its totient is φ = 30228480.

The previous prime is 78321151. The next prime is 78321161. The reversal of 78321152 is 25112387.

It is a super-2 number, since 2×78321152² = 12268405701214208, which contains 22 as substring.

Its product of digits (3360) is a multiple of the sum of its prime factors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78321151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1910252 + ... + 1910292.

Almost surely, 2^78321152 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 78321152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98707224).

78321152 is an abundant number, since it is smaller than the sum of its proper divisors (119093296).

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

78321152 is an equidigital number, since it uses as much as digits as its factorization.

78321152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 63 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 78321152 is about 8849.9238414802. The cubic root of 78321152 is about 427.8514638731.

The spelling of 78321152 in words is "seventy-eight million, three hundred twenty-one thousand, one hundred fifty-two".