438782990 has 24 divisors (see below), whose sum is σ = 816126840. Its totient is φ = 169847760.

The previous prime is 438782989. The next prime is 438783001. The reversal of 438782990 is 99287834.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 13220 + ... + 32439.

It is an arithmetic number, because the mean of its divisors is an integer number (34005285).

Almost surely, 2^438782990 is an apocalyptic number.

438782990 is a deficient number, since it is larger than the sum of its proper divisors (377343850).

438782990 is a wasteful number, since it uses less digits than its factorization.

438782990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45728 (or 45697 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 438782990 is about 20947.1475385075. The cubic root of 438782990 is about 759.8885974754. Note that the first 3 decimals are identical.

The spelling of 438782990 in words is "four hundred thirty-eight million, seven hundred eighty-two thousand, nine hundred ninety".