40439100 has 72 divisors (see below), whose sum is σ = 126016240. Its totient is φ = 9953280.

The previous prime is 40439081. The next prime is 40439101. The reversal of 40439100 is 193404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40439101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1285 + ... + 9084.

Almost surely, 2^40439100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40439100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63008120).

40439100 is an abundant number, since it is smaller than the sum of its proper divisors (85577140).

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

40439100 is a wasteful number, since it uses less digits than its factorization.

40439100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10399 (or 10392 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 40439100 is about 6359.1744747255. The cubic root of 40439100 is about 343.2420553112.

The spelling of 40439100 in words is "forty million, four hundred thirty-nine thousand, one hundred".