2149939642 has 8 divisors (see below), whose sum is σ = 3394641600. Its totient is φ = 1018392444.

The previous prime is 2149939639. The next prime is 2149939657. The reversal of 2149939642 is 2469399412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28288642 + ... + 28288717.

It is an arithmetic number, because the mean of its divisors is an integer number (424330200).

Almost surely, 2^2149939642 is an apocalyptic number.

2149939642 is a deficient number, since it is larger than the sum of its proper divisors (1244701958).

2149939642 is a wasteful number, since it uses less digits than its factorization.

2149939642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56577380.

The product of its digits is 839808, while the sum is 49.

The square root of 2149939642 is about 46367.4416158580. The cubic root of 2149939642 is about 1290.6508027579.

The spelling of 2149939642 in words is "two billion, one hundred forty-nine million, nine hundred thirty-nine thousand, six hundred forty-two".