2137640240 has 40 divisors (see below), whose sum is σ = 5186105568. Its totient is φ = 817879040.

The previous prime is 2137640213. The next prime is 2137640243. The reversal of 2137640240 is 420467312.

2137640240 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (2137640243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579041 + ... + 582720.

Almost surely, 2^2137640240 is an apocalyptic number.

2137640240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2137640240 is an abundant number, since it is smaller than the sum of its proper divisors (3048465328).

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

2137640240 is a wasteful number, since it uses less digits than its factorization.

2137640240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161797 (or 1161791 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 2137640240 is about 46234.6216595313. The cubic root of 2137640240 is about 1288.1849039480.

It can be divided in two parts, 21376 and 40240, that added together give a palindrome (61616).

The spelling of 2137640240 in words is "two billion, one hundred thirty-seven million, six hundred forty thousand, two hundred forty".