39887469 has 12 divisors (see below), whose sum is σ = 57723900. Its totient is φ = 26541504.

The previous prime is 39887461. The next prime is 39887489. The reversal of 39887469 is 96478893.

It can be written as a sum of positive squares in 2 ways, for example, as 14516100 + 25371369 = 3810^2 + 5037^2 .

It is not a de Polignac number, because 39887469 - 2³ = 39887461 is a prime.

It is a super-2 number, since 2×39887469² = 3182020366451922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39887461) 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 11 ways as a sum of consecutive naturals, for example, 1227 + ... + 9015.

It is an arithmetic number, because the mean of its divisors is an integer number (4810325).

Almost surely, 2^39887469 is an apocalyptic number.

It is an amenable number.

39887469 is a deficient number, since it is larger than the sum of its proper divisors (17836431).

39887469 is a wasteful number, since it uses less digits than its factorization.

39887469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8364 (or 8361 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 39887469 is about 6315.6526978611. The cubic root of 39887469 is about 341.6741792783.

The spelling of 39887469 in words is "thirty-nine million, eight hundred eighty-seven thousand, four hundred sixty-nine".