39669894 has 96 divisors (see below), whose sum is σ = 101357568. Its totient is φ = 11088000.

The previous prime is 39669827. The next prime is 39669913. The reversal of 39669894 is 49896693.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 39669894.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 141034 + ... + 141314.

It is an arithmetic number, because the mean of its divisors is an integer number (1055808).

Almost surely, 2^39669894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39669894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50678784).

39669894 is an abundant number, since it is smaller than the sum of its proper divisors (61687674).

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

39669894 is a wasteful number, since it uses less digits than its factorization.

39669894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 351 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 39669894 is about 6298.4040835755. The cubic root of 39669894 is about 341.0518005373.

The spelling of 39669894 in words is "thirty-nine million, six hundred sixty-nine thousand, eight hundred ninety-four".