425138844 has 48 divisors (see below), whose sum is σ = 1071792288. Its totient is φ = 130384128.

The previous prime is 425138821. The next prime is 425138891. The reversal of 425138844 is 448831524.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45154 + ... + 53750.

It is an arithmetic number, because the mean of its divisors is an integer number (22329006).

Almost surely, 2^425138844 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 425138844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (535896144).

425138844 is an abundant number, since it is smaller than the sum of its proper divisors (646653444).

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

425138844 is a wasteful number, since it uses less digits than its factorization.

425138844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8934 (or 8932 counting only the distinct ones).

The product of its digits is 122880, while the sum is 39.

The square root of 425138844 is about 20618.8953147350. The cubic root of 425138844 is about 751.9291632951.

The spelling of 425138844 in words is "four hundred twenty-five million, one hundred thirty-eight thousand, eight hundred forty-four".