438423982 has 12 divisors (see below), whose sum is σ = 698596920. Its totient is φ = 206316896.

The previous prime is 438423977. The next prime is 438423991. The reversal of 438423982 is 289324834.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 378682 + ... + 379837.

It is an arithmetic number, because the mean of its divisors is an integer number (58216410).

Almost surely, 2^438423982 is an apocalyptic number.

438423982 is a deficient number, since it is larger than the sum of its proper divisors (260172938).

438423982 is a wasteful number, since it uses less digits than its factorization.

438423982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758555 (or 758538 counting only the distinct ones).

The product of its digits is 331776, while the sum is 43.

The square root of 438423982 is about 20938.5764081515. The cubic root of 438423982 is about 759.6812964268.

The spelling of 438423982 in words is "four hundred thirty-eight million, four hundred twenty-three thousand, nine hundred eighty-two".