38889999 has 24 divisors (see below), whose sum is σ = 59894640. Its totient is φ = 24231168.

The previous prime is 38889989. The next prime is 38890003. The reversal of 38889999 is 99998883.

It is not a de Polignac number, because 38889999 - 2⁸ = 38889743 is a prime.

38889999 is a modest number, since divided by 9999 gives 3888 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38889989) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23212 + ... + 24830.

It is an arithmetic number, because the mean of its divisors is an integer number (2495610).

Almost surely, 2^38889999 is an apocalyptic number.

38889999 is a deficient number, since it is larger than the sum of its proper divisors (21004641).

38889999 is a wasteful number, since it uses less digits than its factorization.

38889999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799 (or 1796 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The square root of 38889999 is about 6236.1846508903. The cubic root of 38889999 is about 338.8020093254.

The spelling of 38889999 in words is "thirty-eight million, eight hundred eighty-nine thousand, nine hundred ninety-nine".