78147960 has 128 divisors (see below), whose sum is σ = 259580160. Its totient is φ = 18662400.

The previous prime is 78147947. The next prime is 78147977. The reversal of 78147960 is 6974187.

It is a super-2 number, since 2×78147960² = 12214207304323200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95955 + ... + 96765.

It is an arithmetic number, because the mean of its divisors is an integer number (2027970).

Almost surely, 2^78147960 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 78147960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129790080).

78147960 is an abundant number, since it is smaller than the sum of its proper divisors (181432200).

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

78147960 is a wasteful number, since it uses less digits than its factorization.

78147960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 78147960 is about 8840.1334831551. The cubic root of 78147960 is about 427.5358610182.

The spelling of 78147960 in words is "seventy-eight million, one hundred forty-seven thousand, nine hundred sixty".