78225960 has 64 divisors (see below), whose sum is σ = 235975680. Its totient is φ = 20744960.

The previous prime is 78225937. The next prime is 78225971. The reversal of 78225960 is 6952287.

It is a happy number.

It is a super-2 number, since 2×78225960² = 12238601635843200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21214 + ... + 24626.

It is an arithmetic number, because the mean of its divisors is an integer number (3687120).

Almost surely, 2^78225960 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 78225960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117987840).

78225960 is an abundant number, since it is smaller than the sum of its proper divisors (157749720).

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

78225960 is a wasteful number, since it uses less digits than its factorization.

78225960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3618 (or 3614 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 78225960 is about 8844.5440809575. The cubic root of 78225960 is about 427.6780558515.

The spelling of 78225960 in words is "seventy-eight million, two hundred twenty-five thousand, nine hundred sixty".