2149640490 has 64 divisors (see below), whose sum is σ = 5457321216. Its totient is φ = 540790272.

The previous prime is 2149640483. The next prime is 2149640491. The reversal of 2149640490 is 940469412.

It is not an unprimeable number, because it can be changed into a prime (2149640491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29032 + ... + 71708.

It is an arithmetic number, because the mean of its divisors is an integer number (85270644).

Almost surely, 2^2149640490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2149640490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2728660608).

2149640490 is an abundant number, since it is smaller than the sum of its proper divisors (3307680726).

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

2149640490 is a wasteful number, since it uses less digits than its factorization.

2149640490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42783.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 2149640490 is about 46364.2156193761. The cubic root of 2149640490 is about 1290.5909377163.

The spelling of 2149640490 in words is "two billion, one hundred forty-nine million, six hundred forty thousand, four hundred ninety".