39870000 has 150 divisors (see below), whose sum is σ = 139745892. Its totient is φ = 10608000.

The previous prime is 39869969. The next prime is 39870013. The reversal of 39870000 is 7893.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (150).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 89779 + ... + 90221.

Almost surely, 2^39870000 is an apocalyptic number.

39870000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39870000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69872946).

39870000 is an abundant number, since it is smaller than the sum of its proper divisors (99875892).

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

39870000 is a wasteful number, since it uses less digits than its factorization.

39870000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 39870000 is about 6314.2695539548. The cubic root of 39870000 is about 341.6242924513.

Adding to 39870000 its reverse (7893), we get a palindrome (39877893).

The spelling of 39870000 in words is "thirty-nine million, eight hundred seventy thousand".