140731344 has 100 divisors (see below), whose sum is σ = 438701956. Its totient is φ = 43296768.

The previous prime is 140731337. The next prime is 140731361. The reversal of 140731344 is 443137041.

It can be written as a sum of positive squares in 2 ways, for example, as 54464400 + 86266944 = 7380^2 + 9288^2 .

It is a super-2 number, since 2×140731344² = 39610622368092672, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12672 + ... + 21024.

Almost surely, 2^140731344 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 140731344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219350978).

140731344 is an abundant number, since it is smaller than the sum of its proper divisors (297970612).

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

140731344 is a wasteful number, since it uses less digits than its factorization.

140731344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8386 (or 8371 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 140731344 is about 11863.0242349917. The cubic root of 140731344 is about 520.1520068430.

Adding to 140731344 its reverse (443137041), we get a palindrome (583868385).

The spelling of 140731344 in words is "one hundred forty million, seven hundred thirty-one thousand, three hundred forty-four".