39901220 has 12 divisors (see below), whose sum is σ = 83792604. Its totient is φ = 15960480.

The previous prime is 39901177. The next prime is 39901231. The reversal of 39901220 is 2210993.

It can be written as a sum of positive squares in 2 ways, for example, as 28665316 + 11235904 = 5354^2 + 3352^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 39901220.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 997511 + ... + 997550.

It is an arithmetic number, because the mean of its divisors is an integer number (6982717).

Almost surely, 2^39901220 is an apocalyptic number.

It is an amenable number.

39901220 is an abundant number, since it is smaller than the sum of its proper divisors (43891384).

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

39901220 is a wasteful number, since it uses less digits than its factorization.

39901220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995070 (or 1995068 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 39901220 is about 6316.7412484603. The cubic root of 39901220 is about 341.7134382398.

The spelling of 39901220 in words is "thirty-nine million, nine hundred one thousand, two hundred twenty".