1397077686 has 32 divisors (see below), whose sum is σ = 3105889920. Its totient is φ = 465501672.

The previous prime is 1397077681. The next prime is 1397077687. The reversal of 1397077686 is 6867707931.

It is a super-2 number, since 2×1397077686² = 3903652121438229192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397077681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201961 + ... + 208763.

It is an arithmetic number, because the mean of its divisors is an integer number (97059060).

Almost surely, 2^1397077686 is an apocalyptic number.

1397077686 is an abundant number, since it is smaller than the sum of its proper divisors (1708812234).

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

1397077686 is a wasteful number, since it uses less digits than its factorization.

1397077686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10617 (or 10611 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 54.

The square root of 1397077686 is about 37377.5024045214. The cubic root of 1397077686 is about 1117.9100283565.

The spelling of 1397077686 in words is "one billion, three hundred ninety-seven million, seventy-seven thousand, six hundred eighty-six".