1397888676 has 18 divisors (see below), whose sum is σ = 3533552022. Its totient is φ = 465962880.

The previous prime is 1397888671. The next prime is 1397888689. The reversal of 1397888676 is 6768887931.

It can be written as a sum of positive squares in only one way, i.e., 738426276 + 659462400 = 27174^2 + 25680^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (1397888671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19415085 + ... + 19415156.

Almost surely, 2^1397888676 is an apocalyptic number.

It is an amenable number.

1397888676 is an abundant number, since it is smaller than the sum of its proper divisors (2135663346).

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

1397888676 is a wasteful number, since it uses less digits than its factorization.

1397888676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38830251 (or 38830246 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The square root of 1397888676 is about 37388.3494687851. The cubic root of 1397888676 is about 1118.1262984782.

The spelling of 1397888676 in words is "one billion, three hundred ninety-seven million, eight hundred eighty-eight thousand, six hundred seventy-six".