140642240 has 112 divisors (see below), whose sum is σ = 354860352. Its totient is φ = 52985856.

The previous prime is 140642233. The next prime is 140642251. The reversal of 140642240 is 42246041.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

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, 713822 + ... + 714018.

It is an arithmetic number, because the mean of its divisors is an integer number (3168396).

Almost surely, 2^140642240 is an apocalyptic number.

140642240 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 140642240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177430176).

140642240 is an abundant number, since it is smaller than the sum of its proper divisors (214218112).

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

140642240 is a wasteful number, since it uses less digits than its factorization.

140642240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 140642240 is about 11859.2681055789. The cubic root of 140642240 is about 520.0422056473.

Adding to 140642240 its reverse (42246041), we get a palindrome (182888281).

The spelling of 140642240 in words is "one hundred forty million, six hundred forty-two thousand, two hundred forty".