1697813540 has 24 divisors (see below), whose sum is σ = 3720427200. Its totient is φ = 649598048.

The previous prime is 1697813531. The next prime is 1697813617. The reversal of 1697813540 is 453187961.

It is a junction number, because it is equal to n+sod(n) for n = 1697813491 and 1697813500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1844990 + ... + 1845909.

It is an arithmetic number, because the mean of its divisors is an integer number (155017800).

Almost surely, 2^1697813540 is an apocalyptic number.

1697813540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1697813540 is an abundant number, since it is smaller than the sum of its proper divisors (2022613660).

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

1697813540 is a wasteful number, since it uses less digits than its factorization.

1697813540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690931 (or 3690929 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 1697813540 is about 41204.5330030568. The cubic root of 1697813540 is about 1192.9713051038.

The spelling of 1697813540 in words is "one billion, six hundred ninety-seven million, eight hundred thirteen thousand, five hundred forty".