140840724 has 12 divisors (see below), whose sum is σ = 328628384. Its totient is φ = 46946904.

The previous prime is 140840683. The next prime is 140840771. The reversal of 140840724 is 427048041.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×140840724² = 39672219073688352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 140840691 and 140840700.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5868352 + ... + 5868375.

Almost surely, 2^140840724 is an apocalyptic number.

It is an amenable number.

140840724 is an abundant number, since it is smaller than the sum of its proper divisors (187787660).

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

140840724 is a wasteful number, since it uses less digits than its factorization.

140840724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11736734 (or 11736732 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 140840724 is about 11867.6334624895. The cubic root of 140840724 is about 520.2867304266.

Adding to 140840724 its reverse (427048041), we get a palindrome (567888765).

The spelling of 140840724 in words is "one hundred forty million, eight hundred forty thousand, seven hundred twenty-four".