39889893828 has 12 divisors (see below), whose sum is σ = 93076418960. Its totient is φ = 13296631272.

The previous prime is 39889893809. The next prime is 39889893847. The reversal of 39889893828 is 82839898893.

It is an interprime number because it is at equal distance from previous prime (39889893809) and next prime (39889893847).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×39889893828² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39889893828.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662078898 + ... + 1662078921.

Almost surely, 2^39889893828 is an apocalyptic number.

It is an amenable number.

39889893828 is an abundant number, since it is smaller than the sum of its proper divisors (53186525132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39889893828 is a wasteful number, since it uses less digits than its factorization.

39889893828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324157826 (or 3324157824 counting only the distinct ones).

The product of its digits is 429981696, while the sum is 75.

The spelling of 39889893828 in words is "thirty-nine billion, eight hundred eighty-nine million, eight hundred ninety-three thousand, eight hundred twenty-eight".