140561440 has 96 divisors (see below), whose sum is σ = 363170304. Its totient is φ = 51179520.

The previous prime is 140561431. The next prime is 140561497. The reversal of 140561440 is 44165041.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83487 + ... + 85153.

It is an arithmetic number, because the mean of its divisors is an integer number (3783024).

Almost surely, 2^140561440 is an apocalyptic number.

140561440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140561440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181585152).

140561440 is an abundant number, since it is smaller than the sum of its proper divisors (222608864).

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

140561440 is a wasteful number, since it uses less digits than its factorization.

140561440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730 (or 1722 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 140561440 is about 11855.8609978356. The cubic root of 140561440 is about 519.9425972138.

The spelling of 140561440 in words is "one hundred forty million, five hundred sixty-one thousand, four hundred forty".