78715266 has 24 divisors (see below), whose sum is σ = 183134160. Its totient is φ = 22489992.

The previous prime is 78715213. The next prime is 78715267. The reversal of 78715266 is 66251787.

It is a super-3 number, since 3×78715266³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (78715267) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133576 + ... + 134163.

It is an arithmetic number, because the mean of its divisors is an integer number (7630590).

Almost surely, 2^78715266 is an apocalyptic number.

78715266 is an abundant number, since it is smaller than the sum of its proper divisors (104418894).

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

78715266 is a wasteful number, since it uses less digits than its factorization.

78715266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267758 (or 267751 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 78715266 is about 8872.1624196134. The cubic root of 78715266 is about 428.5679165744.

The spelling of 78715266 in words is "seventy-eight million, seven hundred fifteen thousand, two hundred sixty-six".