140820012 has 48 divisors (see below), whose sum is σ = 373591680. Its totient is φ = 45846864.

The previous prime is 140819999. The next prime is 140820019. The reversal of 140820012 is 210028041.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (140820019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10518 + ... + 19805.

It is an arithmetic number, because the mean of its divisors is an integer number (7783160).

Almost surely, 2^140820012 is an apocalyptic number.

140820012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

140820012 is an abundant number, since it is smaller than the sum of its proper divisors (232771668).

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

140820012 is a wasteful number, since it uses less digits than its factorization.

140820012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30379 (or 30371 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 140820012 is about 11866.7608048700. The cubic root of 140820012 is about 520.2612247662.

Adding to 140820012 its reverse (210028041), we get a palindrome (350848053).

The spelling of 140820012 in words is "one hundred forty million, eight hundred twenty thousand, twelve".