1397765712 has 160 divisors (see below), whose sum is σ = 4286582784. Its totient is φ = 384192000.

The previous prime is 1397765701. The next prime is 1397765731. The reversal of 1397765712 is 2175677931.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 962587 + ... + 964037.

Almost surely, 2^1397765712 is an apocalyptic number.

1397765712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397765712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2143291392).

1397765712 is an abundant number, since it is smaller than the sum of its proper divisors (2888817072).

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

1397765712 is a wasteful number, since it uses less digits than its factorization.

1397765712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577 (or 1571 counting only the distinct ones).

The product of its digits is 555660, while the sum is 48.

The square root of 1397765712 is about 37386.7050166232. The cubic root of 1397765712 is about 1118.0935125308.

The spelling of 1397765712 in words is "one billion, three hundred ninety-seven million, seven hundred sixty-five thousand, seven hundred twelve".