78612270 has 64 divisors (see below), whose sum is σ = 206979840. Its totient is φ = 18950400.

The previous prime is 78612269. The next prime is 78612271. The reversal of 78612270 is 7221687.

It is an interprime number because it is at equal distance from previous prime (78612269) and next prime (78612271).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78612271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69066 + ... + 70194.

It is an arithmetic number, because the mean of its divisors is an integer number (3234060).

Almost surely, 2^78612270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78612270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103489920).

78612270 is an abundant number, since it is smaller than the sum of its proper divisors (128367570).

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

78612270 is a wasteful number, since it uses less digits than its factorization.

78612270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 78612270 is about 8866.3560722543. The cubic root of 78612270 is about 428.3809132582.

The spelling of 78612270 in words is "seventy-eight million, six hundred twelve thousand, two hundred seventy".