2100749440 has 64 divisors (see below), whose sum is σ = 5286456000. Its totient is φ = 796068864.

The previous prime is 2100749437. The next prime is 2100749461. The reversal of 2100749440 is 449470012.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74220 + ... + 98539.

It is an arithmetic number, because the mean of its divisors is an integer number (82600875).

Almost surely, 2^2100749440 is an apocalyptic number.

2100749440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100749440 is an abundant number, since it is smaller than the sum of its proper divisors (3185706560).

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

2100749440 is a wasteful number, since it uses less digits than its factorization.

2100749440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172797 (or 172785 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 2100749440 is about 45833.9332809219. The cubic root of 2100749440 is about 1280.7314829407.

The spelling of 2100749440 in words is "two billion, one hundred million, seven hundred forty-nine thousand, four hundred forty".