2690669140 has 24 divisors (see below), whose sum is σ = 5686401672. Its totient is φ = 1069411200.

The previous prime is 2690669089. The next prime is 2690669141. The reversal of 2690669140 is 419660962.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 194267844 + 2496401296 = 13938^2 + 49964^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2690669141) 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 7 ways as a sum of consecutive naturals, for example, 425311 + ... + 431590.

It is an arithmetic number, because the mean of its divisors is an integer number (236933403).

Almost surely, 2^2690669140 is an apocalyptic number.

2690669140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2690669140 is an abundant number, since it is smaller than the sum of its proper divisors (2995732532).

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

2690669140 is a wasteful number, since it uses less digits than its factorization.

2690669140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857067 (or 857065 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 2690669140 is about 51871.6602780362. The cubic root of 2690669140 is about 1390.8707240500.

The spelling of 2690669140 in words is "two billion, six hundred ninety million, six hundred sixty-nine thousand, one hundred forty".