2049649890 has 32 divisors (see below), whose sum is σ = 5178064320. Its totient is φ = 517806144.

The previous prime is 2049649883. The next prime is 2049649919. The reversal of 2049649890 is 989469402.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1797369 + ... + 1798508.

It is an arithmetic number, because the mean of its divisors is an integer number (161814510).

Almost surely, 2^2049649890 is an apocalyptic number.

2049649890 is an abundant number, since it is smaller than the sum of its proper divisors (3128414430).

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

2049649890 is a wasteful number, since it uses less digits than its factorization.

2049649890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3595906.

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 2049649890 is about 45273.0592074359. The cubic root of 2049649890 is about 1270.2617704975.

The spelling of 2049649890 in words is "two billion, forty-nine million, six hundred forty-nine thousand, eight hundred ninety".