2930661638 has 4 divisors (see below), whose sum is σ = 4395992460. Its totient is φ = 1465330818.

The previous prime is 2930661623. The next prime is 2930661703. The reversal of 2930661638 is 8361660392.

2930661638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 732665408 + ... + 732665411.

It is an arithmetic number, because the mean of its divisors is an integer number (1098998115).

Almost surely, 2^2930661638 is an apocalyptic number.

2930661638 is a deficient number, since it is larger than the sum of its proper divisors (1465330822).

2930661638 is a wasteful number, since it uses less digits than its factorization.

2930661638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465330821.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 2930661638 is about 54135.5856900062. The cubic root of 2930661638 is about 1431.0513789886.

The spelling of 2930661638 in words is "two billion, nine hundred thirty million, six hundred sixty-one thousand, six hundred thirty-eight".