438131025 has 90 divisors (see below), whose sum is σ = 850464230. Its totient is φ = 222963840.

The previous prime is 438131009. The next prime is 438131027. The reversal of 438131025 is 520131834.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 98724096 + 339406929 = 9936^2 + 18423^2 .

It is not a de Polignac number, because 438131025 - 2⁴ = 438131009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 438131025.

It is not an unprimeable number, because it can be changed into a prime (438131027) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 1071021 + ... + 1071429.

Almost surely, 2^438131025 is an apocalyptic number.

438131025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

438131025 is a deficient number, since it is larger than the sum of its proper divisors (412333205).

438131025 is a wasteful number, since it uses less digits than its factorization.

438131025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 438131025 is about 20931.5796107222. The cubic root of 438131025 is about 759.5120511667.

Adding to 438131025 its reverse (520131834), we get a palindrome (958262859).

The spelling of 438131025 in words is "four hundred thirty-eight million, one hundred thirty-one thousand, twenty-five".