140597840 has 40 divisors (see below), whose sum is σ = 327765480. Its totient is φ = 56088576.

The previous prime is 140597833. The next prime is 140597843. The reversal of 140597840 is 48795041.

It can be written as a sum of positive squares in 4 ways, for example, as 42667024 + 97930816 = 6532^2 + 9896^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×140597840² = 39535505225331200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 140597794 and 140597803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140597843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30572 + ... + 34868.

It is an arithmetic number, because the mean of its divisors is an integer number (8194137).

Almost surely, 2^140597840 is an apocalyptic number.

140597840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140597840 is an abundant number, since it is smaller than the sum of its proper divisors (187167640).

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

140597840 is a wasteful number, since it uses less digits than its factorization.

140597840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4719 (or 4713 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 140597840 is about 11857.3960041824. The cubic root of 140597840 is about 519.9874750435.

The spelling of 140597840 in words is "one hundred forty million, five hundred ninety-seven thousand, eight hundred forty".