1397700766 has 48 divisors (see below), whose sum is σ = 2640486240. Its totient is φ = 543153600.

The previous prime is 1397700761. The next prime is 1397700793. The reversal of 1397700766 is 6670077931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397700761) 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 23 ways as a sum of consecutive naturals, for example, 861436 + ... + 863056.

It is an arithmetic number, because the mean of its divisors is an integer number (55010130).

Almost surely, 2^1397700766 is an apocalyptic number.

1397700766 is a deficient number, since it is larger than the sum of its proper divisors (1242785474).

1397700766 is a wasteful number, since it uses less digits than its factorization.

1397700766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161 (or 2150 counting only the distinct ones).

The product of its (nonzero) digits is 333396, while the sum is 46.

The square root of 1397700766 is about 37385.8364357413. The cubic root of 1397700766 is about 1118.0761951733.

It can be divided in two parts, 13 and 97700766, that added together give a palindrome (97700779).

The spelling of 1397700766 in words is "one billion, three hundred ninety-seven million, seven hundred thousand, seven hundred sixty-six".