39979800 has 288 divisors, whose sum is σ = 162489600. Its totient is φ = 8605440.

The previous prime is 39979769. The next prime is 39979813. The reversal of 39979800 is 897993.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 239317 + ... + 239483.

It is an arithmetic number, because the mean of its divisors is an integer number (564200).

Almost surely, 2^39979800 is an apocalyptic number.

39979800 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 39979800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81244800).

39979800 is an abundant number, since it is smaller than the sum of its proper divisors (122509800).

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

39979800 is a wasteful number, since it uses less digits than its factorization.

39979800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 39979800 is about 6322.9581684525. The cubic root of 39979800 is about 341.9376104516.

The spelling of 39979800 in words is "thirty-nine million, nine hundred seventy-nine thousand, eight hundred".