2691727240 has 16 divisors (see below), whose sum is σ = 6056386380. Its totient is φ = 1076690880.

The previous prime is 2691727193. The next prime is 2691727261. The reversal of 2691727240 is 427271962.

It can be written as a sum of positive squares in 2 ways, for example, as 2637233316 + 54493924 = 51354^2 + 7382^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 67293181 = 2691727240 / (2 + 6 + 9 + 1 + 7 + 2 + 7 + 2 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 2691727193 and 2691727202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33646551 + ... + 33646630.

Almost surely, 2^2691727240 is an apocalyptic number.

2691727240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2691727240 is an abundant number, since it is smaller than the sum of its proper divisors (3364659140).

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

2691727240 is a wasteful number, since it uses less digits than its factorization.

2691727240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67293192 (or 67293188 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 2691727240 is about 51881.8584863727. The cubic root of 2691727240 is about 1391.0530191554.

The spelling of 2691727240 in words is "two billion, six hundred ninety-one million, seven hundred twenty-seven thousand, two hundred forty".