438494988 has 24 divisors (see below), whose sum is σ = 1032720192. Its totient is φ = 144798544.

The previous prime is 438494981. The next prime is 438495097. The reversal of 438494988 is 889494834.

It is a super-2 number, since 2×438494988² = 384555709002240288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (438494981) 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 7 ways as a sum of consecutive naturals, for example, 169470 + ... + 172037.

It is an arithmetic number, because the mean of its divisors is an integer number (43030008).

Almost surely, 2^438494988 is an apocalyptic number.

It is an amenable number.

438494988 is an abundant number, since it is smaller than the sum of its proper divisors (594225204).

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

438494988 is a wasteful number, since it uses less digits than its factorization.

438494988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341621 (or 341619 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 57.

The square root of 438494988 is about 20940.2719180053. The cubic root of 438494988 is about 759.7223062107.

The spelling of 438494988 in words is "four hundred thirty-eight million, four hundred ninety-four thousand, nine hundred eighty-eight".