78630 has 16 divisors (see below), whose sum is σ = 188784. Its totient is φ = 20960.

The previous prime is 78623. The next prime is 78643. The reversal of 78630 is 3687.

It is a self number, because there is not a number n which added to its sum of digits gives 78630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1281 + ... + 1340.

It is an arithmetic number, because the mean of its divisors is an integer number (11799).

2⁷⁸⁶³⁰ is an apocalyptic number.

78630 is an abundant number, since it is smaller than the sum of its proper divisors (110154).

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 (94392).

78630 is a wasteful number, since it uses less digits than its factorization.

78630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 78630 is about 280.4104135014. The cubic root of 78630 is about 42.8413116130.

Subtracting from 78630 its sum of digits (24), we obtain a triangular number (78606 = T₃₉₆).

The spelling of 78630 in words is "seventy-eight thousand, six hundred thirty".