40439000 has 128 divisors (see below), whose sum is σ = 111196800. Its totient is φ = 13478400.

The previous prime is 40438999. The next prime is 40439023. The reversal of 40439000 is 93404.

It is a super-3 number, since 3×40439000³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370946 + ... + 371054.

It is an arithmetic number, because the mean of its divisors is an integer number (868725).

Almost surely, 2^40439000 is an apocalyptic number.

40439000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40439000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55598400).

40439000 is an abundant number, since it is smaller than the sum of its proper divisors (70757800).

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

40439000 is a wasteful number, since it uses less digits than its factorization.

40439000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 40439000 is about 6359.1666120648. The cubic root of 40439000 is about 343.2417723817.

The spelling of 40439000 in words is "forty million, four hundred thirty-nine thousand".