2097840690 has 48 divisors (see below), whose sum is σ = 5950241856. Its totient is φ = 508567200.

The previous prime is 2097840659. The next prime is 2097840697. The reversal of 2097840690 is 960487902.

It is a happy number.

It is a super-2 number, since 2×2097840690² = 8801871121239352200, which contains 22 as substring.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2097840697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1058526 + ... + 1060505.

It is an arithmetic number, because the mean of its divisors is an integer number (123963372).

Almost surely, 2^2097840690 is an apocalyptic number.

2097840690 is an abundant number, since it is smaller than the sum of its proper divisors (3852401166).

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

2097840690 is a wasteful number, since it uses less digits than its factorization.

2097840690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2119055 (or 2119052 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 2097840690 is about 45802.1908864631. The cubic root of 2097840690 is about 1280.1400990045.

The spelling of 2097840690 in words is "two billion, ninety-seven million, eight hundred forty thousand, six hundred ninety".