39889450 has 24 divisors (see below), whose sum is σ = 74423808. Its totient is φ = 15906480.

The previous prime is 39889439. The next prime is 39889457. The reversal of 39889450 is 5498893.

It is a self number, because there is not a number n which added to its sum of digits gives 39889450.

It is not an unprimeable number, because it can be changed into a prime (39889457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18109 + ... + 20191.

It is an arithmetic number, because the mean of its divisors is an integer number (3100992).

Almost surely, 2^39889450 is an apocalyptic number.

39889450 is a deficient number, since it is larger than the sum of its proper divisors (34534358).

39889450 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (39889449) it forms an eRAP, since the sums of their prime factors are consecutive (2477 and 2478).

39889450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478 (or 2473 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 39889450 is about 6315.8095284769. The cubic root of 39889450 is about 341.6798355688.

The spelling of 39889450 in words is "thirty-nine million, eight hundred eighty-nine thousand, four hundred fifty".