39849880 has 64 divisors (see below), whose sum is σ = 105799680. Its totient is φ = 13219200.

The previous prime is 39849871. The next prime is 39849881. The reversal of 39849880 is 8894893.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39849881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6385 + ... + 10975.

It is an arithmetic number, because the mean of its divisors is an integer number (1653120).

Almost surely, 2^39849880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39849880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52899840).

39849880 is an abundant number, since it is smaller than the sum of its proper divisors (65949800).

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

39849880 is a wasteful number, since it uses less digits than its factorization.

39849880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4640 (or 4636 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 39849880 is about 6312.6761361565. The cubic root of 39849880 is about 341.5668170119.

The spelling of 39849880 in words is "thirty-nine million, eight hundred forty-nine thousand, eight hundred eighty".