438002140 has 12 divisors (see below), whose sum is σ = 919804536. Its totient is φ = 175200848.

The previous prime is 438002101. The next prime is 438002203. The reversal of 438002140 is 41200834.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10950034 + ... + 10950073.

It is an arithmetic number, because the mean of its divisors is an integer number (76650378).

Almost surely, 2^438002140 is an apocalyptic number.

It is an amenable number.

438002140 is an abundant number, since it is smaller than the sum of its proper divisors (481802396).

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

438002140 is a wasteful number, since it uses less digits than its factorization.

438002140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21900116 (or 21900114 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 438002140 is about 20928.5006629715. The cubic root of 438002140 is about 759.4375686448.

Adding to 438002140 its reverse (41200834), we get a palindrome (479202974).

The spelling of 438002140 in words is "four hundred thirty-eight million, two thousand, one hundred forty".