1401820188 has 12 divisors (see below), whose sum is σ = 3270913800. Its totient is φ = 467273392.

The previous prime is 1401820159. The next prime is 1401820229. The reversal of 1401820188 is 8810281041.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 58409163 + ... + 58409186.

It is an arithmetic number, because the mean of its divisors is an integer number (272576150).

Almost surely, 2^1401820188 is an apocalyptic number.

It is an amenable number.

1401820188 is an abundant number, since it is smaller than the sum of its proper divisors (1869093612).

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

1401820188 is a wasteful number, since it uses less digits than its factorization.

1401820188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116818356 (or 116818354 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 33.

The square root of 1401820188 is about 37440.8892522600. The cubic root of 1401820188 is about 1119.1735474076.

The spelling of 1401820188 in words is "one billion, four hundred one million, eight hundred twenty thousand, one hundred eighty-eight".