140805020 has 24 divisors (see below), whose sum is σ = 296082864. Its totient is φ = 56247296.

The previous prime is 140805013. The next prime is 140805023. The reversal of 140805020 is 20508041.

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 = 140804983 and 140805001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140805023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12284 + ... + 20796.

It is an arithmetic number, because the mean of its divisors is an integer number (12336786).

Almost surely, 2^140805020 is an apocalyptic number.

140805020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140805020 is an abundant number, since it is smaller than the sum of its proper divisors (155277844).

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

140805020 is a wasteful number, since it uses less digits than its factorization.

140805020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9349 (or 9347 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 140805020 is about 11866.1291076745. The cubic root of 140805020 is about 520.2427614029.

The spelling of 140805020 in words is "one hundred forty million, eight hundred five thousand, twenty".