1397272306 has 8 divisors (see below), whose sum is σ = 2140502400. Its totient is φ = 683771508.

The previous prime is 1397272297. The next prime is 1397272319. The reversal of 1397272306 is 6032727931.

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

It is a super-2 number, since 2×1397272306² = 3904739794229115272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7432206 + ... + 7432393.

It is an arithmetic number, because the mean of its divisors is an integer number (267562800).

Almost surely, 2^1397272306 is an apocalyptic number.

1397272306 is a deficient number, since it is larger than the sum of its proper divisors (743230094).

1397272306 is a wasteful number, since it uses less digits than its factorization.

1397272306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14864648.

The product of its (nonzero) digits is 95256, while the sum is 40.

The square root of 1397272306 is about 37380.1057515893. The cubic root of 1397272306 is about 1117.9619361232.

The spelling of 1397272306 in words is "one billion, three hundred ninety-seven million, two hundred seventy-two thousand, three hundred six".