38889515 has 16 divisors (see below), whose sum is σ = 53811648. Its totient is φ = 26428416.

The previous prime is 38889503. The next prime is 38889517. The reversal of 38889515 is 51598883.

It is not a de Polignac number, because 38889515 - 2⁸ = 38889259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38889515.

It is not an unprimeable number, because it can be changed into a prime (38889517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 962 + ... + 8871.

It is an arithmetic number, because the mean of its divisors is an integer number (3363228).

Almost surely, 2^38889515 is an apocalyptic number.

38889515 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

38889515 is a deficient number, since it is larger than the sum of its proper divisors (14922133).

38889515 is a wasteful number, since it uses less digits than its factorization.

38889515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9958.

The product of its digits is 345600, while the sum is 47.

The square root of 38889515 is about 6236.1458449911. The cubic root of 38889515 is about 338.8006038153.

The spelling of 38889515 in words is "thirty-eight million, eight hundred eighty-nine thousand, five hundred fifteen".