890121804040 has 64 divisors (see below), whose sum is σ = 2423524924800. Its totient is φ = 287232580608.

The previous prime is 890121804001. The next prime is 890121804049. The reversal of 890121804040 is 40408121098.

It is not an unprimeable number, because it can be changed into a prime (890121804049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93495430 + ... + 93504949.

It is an arithmetic number, because the mean of its divisors is an integer number (37867576950).

Almost surely, 2^890121804040 is an apocalyptic number.

It is an amenable number.

890121804040 is an abundant number, since it is smaller than the sum of its proper divisors (1533403120760).

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

890121804040 is a wasteful number, since it uses less digits than its factorization.

890121804040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187000414 (or 187000410 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The spelling of 890121804040 in words is "eight hundred ninety billion, one hundred twenty-one million, eight hundred four thousand, forty".