140505840 has 100 divisors (see below), whose sum is σ = 488020104. Its totient is φ = 37466496.

The previous prime is 140505839. The next prime is 140505851. The reversal of 140505840 is 48505041.

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, 4362 + ... + 17321.

Almost surely, 2^140505840 is an apocalyptic number.

140505840 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 140505840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244010052).

140505840 is an abundant number, since it is smaller than the sum of its proper divisors (347514264).

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

140505840 is a wasteful number, since it uses less digits than its factorization.

140505840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21708 (or 21693 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 140505840 is about 11853.5159341016. The cubic root of 140505840 is about 519.8740326039.

The spelling of 140505840 in words is "one hundred forty million, five hundred five thousand, eight hundred forty".