2146639790 has 16 divisors (see below), whose sum is σ = 3910506768. Its totient is φ = 848310336.

The previous prime is 2146639783. The next prime is 2146639811. The reversal of 2146639790 is 979366412.

It is a happy number.

It is a super-2 number, since 2×2146639790² = 9216124776022488200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1292327 + ... + 1293986.

It is an arithmetic number, because the mean of its divisors is an integer number (244406673).

Almost surely, 2^2146639790 is an apocalyptic number.

2146639790 is a deficient number, since it is larger than the sum of its proper divisors (1763866978).

2146639790 is a wasteful number, since it uses less digits than its factorization.

2146639790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586403.

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 2146639790 is about 46331.8442326657. The cubic root of 2146639790 is about 1289.9901427446.

The spelling of 2146639790 in words is "two billion, one hundred forty-six million, six hundred thirty-nine thousand, seven hundred ninety".