38890438742 has 16 divisors (see below), whose sum is σ = 60245942400. Its totient is φ = 18809051520.

The previous prime is 38890438733. The next prime is 38890438747. The reversal of 38890438742 is 24783409883.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38890438747) 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, 15317 + ... + 279312.

It is an arithmetic number, because the mean of its divisors is an integer number (3765371400).

Almost surely, 2^38890438742 is an apocalyptic number.

38890438742 is a deficient number, since it is larger than the sum of its proper divisors (21355503658).

38890438742 is a wasteful number, since it uses less digits than its factorization.

38890438742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296791.

The product of its (nonzero) digits is 9289728, while the sum is 56.

The spelling of 38890438742 in words is "thirty-eight billion, eight hundred ninety million, four hundred thirty-eight thousand, seven hundred forty-two".