39955890 has 32 divisors (see below), whose sum is σ = 103271616. Its totient is φ = 9835200.

The previous prime is 39955873. The next prime is 39955891. The reversal of 39955890 is 9855993.

39955890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (39955891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50836 + ... + 51615.

It is an arithmetic number, because the mean of its divisors is an integer number (3227238).

Almost surely, 2^39955890 is an apocalyptic number.

39955890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

39955890 is an abundant number, since it is smaller than the sum of its proper divisors (63315726).

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

39955890 is a wasteful number, since it uses less digits than its factorization.

39955890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102474.

The product of its (nonzero) digits is 437400, while the sum is 48.

The square root of 39955890 is about 6321.0671567386. The cubic root of 39955890 is about 341.8694313658.

The spelling of 39955890 in words is "thirty-nine million, nine hundred fifty-five thousand, eight hundred ninety".