140020432 has 40 divisors (see below), whose sum is σ = 295032456. Its totient is φ = 64106496.

The previous prime is 140020429. The next prime is 140020451. The reversal of 140020432 is 234020041.

It can be written as a sum of positive squares in 4 ways, for example, as 77862976 + 62157456 = 8824^2 + 7884^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3108 + ... + 17020.

Almost surely, 2^140020432 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 140020432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147516228).

140020432 is an abundant number, since it is smaller than the sum of its proper divisors (155012024).

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

140020432 is a wasteful number, since it uses less digits than its factorization.

140020432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13975 (or 13969 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 140020432 is about 11833.0229442860. The cubic root of 140020432 is about 519.2746692039.

Adding to 140020432 its reverse (234020041), we get a palindrome (374040473).

The spelling of 140020432 in words is "one hundred forty million, twenty thousand, four hundred thirty-two".