140331438 has 48 divisors (see below), whose sum is σ = 335449296. Its totient is φ = 42122880.

The previous prime is 140331431. The next prime is 140331461. The reversal of 140331438 is 834133041.

140331438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×140331438² = 39385824982295688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140331431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2281 + ... + 16907.

It is an arithmetic number, because the mean of its divisors is an integer number (6988527).

Almost surely, 2^140331438 is an apocalyptic number.

140331438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 140331438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167724648).

140331438 is an abundant number, since it is smaller than the sum of its proper divisors (195117858).

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

140331438 is a wasteful number, since it uses less digits than its factorization.

140331438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14689 (or 14686 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 140331438 is about 11846.1570984012. The cubic root of 140331438 is about 519.6588467434.

Adding to 140331438 its reverse (834133041), we get a palindrome (974464479).

The spelling of 140331438 in words is "one hundred forty million, three hundred thirty-one thousand, four hundred thirty-eight".