39828280 has 64 divisors (see below), whose sum is σ = 97511040. Its totient is φ = 14579712.

The previous prime is 39828253. The next prime is 39828287. The reversal of 39828280 is 8282893.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39828287) 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, 24369 + ... + 25951.

It is an arithmetic number, because the mean of its divisors is an integer number (1523610).

Almost surely, 2^39828280 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 39828280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48755520).

39828280 is an abundant number, since it is smaller than the sum of its proper divisors (57682760).

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

39828280 is a wasteful number, since it uses less digits than its factorization.

39828280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648 (or 1644 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 39828280 is about 6310.9650609079. The cubic root of 39828280 is about 341.5050922199.

The spelling of 39828280 in words is "thirty-nine million, eight hundred twenty-eight thousand, two hundred eighty".