39999894 has 16 divisors (see below), whose sum is σ = 87272640. Its totient is φ = 12121160.

The previous prime is 39999863. The next prime is 39999899. The reversal of 39999894 is 49899993.

It is a super-2 number, since 2×39999894² = 3199983040022472, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39999899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302964 + ... + 303095.

It is an arithmetic number, because the mean of its divisors is an integer number (5454540).

Almost surely, 2^39999894 is an apocalyptic number.

39999894 is an abundant number, since it is smaller than the sum of its proper divisors (47272746).

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

39999894 is a wasteful number, since it uses less digits than its factorization.

39999894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606075.

The product of its digits is 5668704, while the sum is 60.

The square root of 39999894 is about 6324.5469402954. The cubic root of 39999894 is about 341.9948872393.

Subtracting 39999894 from its reverse (49899993), we obtain a palindrome (9900099).

It can be divided in two parts, 3999989 and 4, that added together give a palindrome (3999993).

The spelling of 39999894 in words is "thirty-nine million, nine hundred ninety-nine thousand, eight hundred ninety-four".