39240990 has 128 divisors (see below), whose sum is σ = 111974400. Its totient is φ = 9757440.

The previous prime is 39240961. The next prime is 39240991. The reversal of 39240990 is 9904293.

39240990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39240991) 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 63 ways as a sum of consecutive naturals, for example, 440866 + ... + 440954.

It is an arithmetic number, because the mean of its divisors is an integer number (874800).

Almost surely, 2^39240990 is an apocalyptic number.

39240990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 39240990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55987200).

39240990 is an abundant number, since it is smaller than the sum of its proper divisors (72733410).

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

39240990 is a wasteful number, since it uses less digits than its factorization.

39240990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 39240990 is about 6264.2629255165. The cubic root of 39240990 is about 339.8182130871.

The spelling of 39240990 in words is "thirty-nine million, two hundred forty thousand, nine hundred ninety".