440172420 has 96 divisors (see below), whose sum is σ = 1269571968. Its totient is φ = 113897472.

The previous prime is 440172419. The next prime is 440172431. The reversal of 440172420 is 24271044.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 307747 + ... + 309173.

It is an arithmetic number, because the mean of its divisors is an integer number (13224708).

Almost surely, 2^440172420 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 440172420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (634785984).

440172420 is an abundant number, since it is smaller than the sum of its proper divisors (829399548).

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

440172420 is a wasteful number, since it uses less digits than its factorization.

440172420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589 (or 1587 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 440172420 is about 20980.2864613427. The cubic root of 440172420 is about 760.6898284300.

The spelling of 440172420 in words is "four hundred forty million, one hundred seventy-two thousand, four hundred twenty".