439900380 has 72 divisors (see below), whose sum is σ = 1353197664. Its totient is φ = 115651200.

The previous prime is 439900379. The next prime is 439900387. The reversal of 439900380 is 83009934.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439900387) 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, 4431 + ... + 29990.

It is an arithmetic number, because the mean of its divisors is an integer number (18794412).

Almost surely, 2^439900380 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 439900380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (676598832).

439900380 is an abundant number, since it is smaller than the sum of its proper divisors (913297284).

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

439900380 is a wasteful number, since it uses less digits than its factorization.

439900380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34507 (or 34502 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 439900380 is about 20973.8022304016. The cubic root of 439900380 is about 760.5330862857.

The spelling of 439900380 in words is "four hundred thirty-nine million, nine hundred thousand, three hundred eighty".