140391912 has 128 divisors (see below), whose sum is σ = 389059200. Its totient is φ = 42052608.

The previous prime is 140391887. The next prime is 140391959. The reversal of 140391912 is 219193041.

140391912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 140391912.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 894138 + ... + 894294.

It is an arithmetic number, because the mean of its divisors is an integer number (3039525).

Almost surely, 2^140391912 is an apocalyptic number.

140391912 is a gapful number since it is divisible by the number (12) 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 140391912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194529600).

140391912 is an abundant number, since it is smaller than the sum of its proper divisors (248667288).

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

140391912 is a wasteful number, since it uses less digits than its factorization.

140391912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 140391912 is about 11848.7092967968. The cubic root of 140391912 is about 519.7334827538.

Subtracting 140391912 from its reverse (219193041), we obtain a square (78801129 = 8877²).

It can be divided in two parts, 14039 and 1912, that added together give a palindrome (15951).

The spelling of 140391912 in words is "one hundred forty million, three hundred ninety-one thousand, nine hundred twelve".