140440830 has 16 divisors (see below), whose sum is σ = 337058064. Its totient is φ = 37450880.

The previous prime is 140440801. The next prime is 140440871. The reversal of 140440830 is 38044041.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 140440830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2340651 + ... + 2340710.

It is an arithmetic number, because the mean of its divisors is an integer number (21066129).

Almost surely, 2^140440830 is an apocalyptic number.

140440830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

140440830 is an abundant number, since it is smaller than the sum of its proper divisors (196617234).

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

140440830 is a wasteful number, since it uses less digits than its factorization.

140440830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4681371.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 140440830 is about 11850.7733924837. The cubic root of 140440830 is about 519.7938408608.

Adding to 140440830 its reverse (38044041), we get a palindrome (178484871).

The spelling of 140440830 in words is "one hundred forty million, four hundred forty thousand, eight hundred thirty".