78270 has 16 divisors (see below), whose sum is σ = 187920. Its totient is φ = 20864.

The previous prime is 78259. The next prime is 78277. The reversal of 78270 is 7287.

It is a super-2 number, since 2×78270² = 12252385800, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 78270.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 78270.

It is not an unprimeable number, because it can be changed into a prime (78277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1275 + ... + 1334.

It is an arithmetic number, because the mean of its divisors is an integer number (11745).

2⁷⁸²⁷⁰ is an apocalyptic number.

78270 is an abundant number, since it is smaller than the sum of its proper divisors (109650).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93960).

78270 is a wasteful number, since it uses less digits than its factorization.

78270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2619.

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 78270 is about 279.7677608303. The cubic root of 78270 is about 42.7758299495.

The spelling of 78270 in words is "seventy-eight thousand, two hundred seventy".