140931820 has 24 divisors (see below), whose sum is σ = 300376944. Its totient is φ = 55530816.

The previous prime is 140931811. The next prime is 140931821. The reversal of 140931820 is 28139041.

It is a happy number.

140931820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (140931821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51247 + ... + 53926.

It is an arithmetic number, because the mean of its divisors is an integer number (12515706).

Almost surely, 2^140931820 is an apocalyptic number.

140931820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140931820 is an abundant number, since it is smaller than the sum of its proper divisors (159445124).

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

140931820 is a wasteful number, since it uses less digits than its factorization.

140931820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105249 (or 105247 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 140931820 is about 11871.4708440024. The cubic root of 140931820 is about 520.3988803401.

The spelling of 140931820 in words is "one hundred forty million, nine hundred thirty-one thousand, eight hundred twenty".