140233520 has 80 divisors (see below), whose sum is σ = 377975808. Its totient is φ = 47389440.

The previous prime is 140233519. The next prime is 140233523. The reversal of 140233520 is 25332041.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 140233492 and 140233501.

It is not an unprimeable number, because it can be changed into a prime (140233523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37997 + ... + 41523.

Almost surely, 2^140233520 is an apocalyptic number.

140233520 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 140233520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188987904).

140233520 is an abundant number, since it is smaller than the sum of its proper divisors (237742288).

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

140233520 is a wasteful number, since it uses less digits than its factorization.

140233520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3618 (or 3612 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 140233520 is about 11842.0234757410. The cubic root of 140233520 is about 519.5379524871.

Adding to 140233520 its reverse (25332041), we get a palindrome (165565561).

The spelling of 140233520 in words is "one hundred forty million, two hundred thirty-three thousand, five hundred twenty".