78272894 has 48 divisors (see below), whose sum is σ = 145336320. Its totient is φ = 31434480.

The previous prime is 78272867. The next prime is 78272897. The reversal of 78272894 is 49827287.

It is a happy number.

It is a super-2 number, since 2×78272894² = 12253291870270472, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78272897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 236309 + ... + 236639.

It is an arithmetic number, because the mean of its divisors is an integer number (3027840).

Almost surely, 2^78272894 is an apocalyptic number.

78272894 is a deficient number, since it is larger than the sum of its proper divisors (67063426).

78272894 is a wasteful number, since it uses less digits than its factorization.

78272894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 486 counting only the distinct ones).

The product of its digits is 451584, while the sum is 47.

The square root of 78272894 is about 8847.1969572289. The cubic root of 78272894 is about 427.7635714903.

The spelling of 78272894 in words is "seventy-eight million, two hundred seventy-two thousand, eight hundred ninety-four".