445272438 has 64 divisors (see below), whose sum is σ = 1002456000. Its totient is φ = 130905600.

The previous prime is 445272431. The next prime is 445272463. The reversal of 445272438 is 834272544.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 445272396 and 445272405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445272431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227488 + ... + 229436.

It is an arithmetic number, because the mean of its divisors is an integer number (15663375).

Almost surely, 2^445272438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 445272438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501228000).

445272438 is an abundant number, since it is smaller than the sum of its proper divisors (557183562).

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

445272438 is a wasteful number, since it uses less digits than its factorization.

445272438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097.

The product of its digits is 215040, while the sum is 39.

The square root of 445272438 is about 21101.4795215881. The cubic root of 445272438 is about 763.6164423864.

The spelling of 445272438 in words is "four hundred forty-five million, two hundred seventy-two thousand, four hundred thirty-eight".