78271274 has 4 divisors (see below), whose sum is σ = 117406914. Its totient is φ = 39135636.

The previous prime is 78271267. The next prime is 78271331. The reversal of 78271274 is 47217287.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 78234025 + 37249 = 8845^2 + 193^2 .

It is a super-2 number, since 2×78271274² = 12252784667166152, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19567817 + ... + 19567820.

Almost surely, 2^78271274 is an apocalyptic number.

78271274 is a deficient number, since it is larger than the sum of its proper divisors (39135640).

78271274 is a wasteful number, since it uses less digits than its factorization.

78271274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39135639.

The product of its digits is 43904, while the sum is 38.

The square root of 78271274 is about 8847.1054023336. The cubic root of 78271274 is about 427.7606203547.

The spelling of 78271274 in words is "seventy-eight million, two hundred seventy-one thousand, two hundred seventy-four".