1397770560 has 112 divisors (see below), whose sum is σ = 4931054400. Its totient is φ = 372736512.

The previous prime is 1397770541. The next prime is 1397770567. The reversal of 1397770560 is 650777931.

1397770560 is a `hidden beast` number, since 13 + 9 + 7 + 7 + 70 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397770567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72250 + ... + 89529.

Almost surely, 2^1397770560 is an apocalyptic number.

1397770560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1397770560 is an abundant number, since it is smaller than the sum of its proper divisors (3533283840).

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

1397770560 is a wasteful number, since it uses less digits than its factorization.

1397770560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161805 (or 161789 counting only the distinct ones).

The product of its (nonzero) digits is 277830, while the sum is 45.

The square root of 1397770560 is about 37386.7698524491. The cubic root of 1397770560 is about 1118.0948051917.

The spelling of 1397770560 in words is "one billion, three hundred ninety-seven million, seven hundred seventy thousand, five hundred sixty".