140905836 has 36 divisors (see below), whose sum is σ = 356664672. Its totient is φ = 46904544.

The previous prime is 140905823. The next prime is 140905909. The reversal of 140905836 is 638509041.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 140905836.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29341 + ... + 33803.

It is an arithmetic number, because the mean of its divisors is an integer number (9907352).

Almost surely, 2^140905836 is an apocalyptic number.

It is an amenable number.

140905836 is an abundant number, since it is smaller than the sum of its proper divisors (215758836).

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

140905836 is a wasteful number, since it uses less digits than its factorization.

140905836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5350 (or 5345 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 140905836 is about 11870.3764051524. The cubic root of 140905836 is about 520.3668959011.

The spelling of 140905836 in words is "one hundred forty million, nine hundred five thousand, eight hundred thirty-six".