1397422560 has 48 divisors (see below), whose sum is σ = 4401882576. Its totient is φ = 372645888.

The previous prime is 1397422531. The next prime is 1397422561. The reversal of 1397422560 is 652247931.

1397422560 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1397422560² = 3905579622393907200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397422561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1455169 + ... + 1456128.

It is an arithmetic number, because the mean of its divisors is an integer number (91705887).

Almost surely, 2^1397422560 is an apocalyptic number.

1397422560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1397422560 is an abundant number, since it is smaller than the sum of its proper divisors (3004460016).

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

1397422560 is a wasteful number, since it uses less digits than its factorization.

1397422560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911315 (or 2911307 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 1397422560 is about 37382.1155099601. The cubic root of 1397422560 is about 1118.0020075851.

The spelling of 1397422560 in words is "one billion, three hundred ninety-seven million, four hundred twenty-two thousand, five hundred sixty".