78271794 has 12 divisors (see below), whose sum is σ = 169588926. Its totient is φ = 26090592.

The previous prime is 78271793. The next prime is 78271801. The reversal of 78271794 is 49717287.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 71318025 + 6953769 = 8445^2 + 2637^2 .

It is a super-2 number, since 2×78271794² = 12252947471956872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78271793) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2174199 + ... + 2174234.

Almost surely, 2^78271794 is an apocalyptic number.

78271794 is an abundant number, since it is smaller than the sum of its proper divisors (91317132).

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

78271794 is a wasteful number, since it uses less digits than its factorization.

78271794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4348441 (or 4348438 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 78271794 is about 8847.1347904279. The cubic root of 78271794 is about 427.7615676372.

The spelling of 78271794 in words is "seventy-eight million, two hundred seventy-one thousand, seven hundred ninety-four".