78274293 has 8 divisors (see below), whose sum is σ = 105399456. Its totient is φ = 51666000.

The previous prime is 78274271. The next prime is 78274303. The reversal of 78274293 is 39247287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78274293 - 2²¹ = 76177141 is a prime.

It is a super-2 number, since 2×78274293² = 12253729889299698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78274213) 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, 128863 + ... + 129468.

It is an arithmetic number, because the mean of its divisors is an integer number (13174932).

Almost surely, 2^78274293 is an apocalyptic number.

It is an amenable number.

78274293 is a deficient number, since it is larger than the sum of its proper divisors (27125163).

78274293 is a wasteful number, since it uses less digits than its factorization.

78274293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258435.

The product of its digits is 169344, while the sum is 42.

The square root of 78274293 is about 8847.2760214656. The cubic root of 78274293 is about 427.7661199999.

The spelling of 78274293 in words is "seventy-eight million, two hundred seventy-four thousand, two hundred ninety-three".