1397000840 has 64 divisors (see below), whose sum is σ = 3503347200. Its totient is φ = 498244608.

The previous prime is 1397000809. The next prime is 1397000849. The reversal of 1397000840 is 480007931.

It is a super-2 number, since 2×1397000840² = 3903222693921411200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1397000797 and 1397000806.

It is not an unprimeable number, because it can be changed into a prime (1397000849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41144 + ... + 66983.

It is an arithmetic number, because the mean of its divisors is an integer number (54739800).

Almost surely, 2^1397000840 is an apocalyptic number.

1397000840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1397000840 is an abundant number, since it is smaller than the sum of its proper divisors (2106346360).

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

1397000840 is a wasteful number, since it uses less digits than its factorization.

1397000840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108174 (or 108170 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1397000840 is about 37376.4744190781. The cubic root of 1397000840 is about 1117.8895311692.

The spelling of 1397000840 in words is "one billion, three hundred ninety-seven million, eight hundred forty", and thus it is an aban number.