7738442090 has 16 divisors (see below), whose sum is σ = 14268933000. Its totient is φ = 3019879680.

The previous prime is 7738442081. The next prime is 7738442093. The reversal of 7738442090 is 902448377.

It can be written as a sum of positive squares in 4 ways, for example, as 4437824689 + 3300617401 = 66617^2 + 57451^2 .

It is not an unprimeable number, because it can be changed into a prime (7738442093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9436715 + ... + 9437534.

Almost surely, 2^7738442090 is an apocalyptic number.

7738442090 is a deficient number, since it is larger than the sum of its proper divisors (6530490910).

7738442090 is a wasteful number, since it uses less digits than its factorization.

7738442090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18874297.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 7738442090 is about 87968.4152977647. The cubic root of 7738442090 is about 1977.9615529187.

The spelling of 7738442090 in words is "seven billion, seven hundred thirty-eight million, four hundred forty-two thousand, ninety".