890256409156 has 27 divisors (see below), whose sum is σ = 1655043223197. Its totient is φ = 418929096000.

The previous prime is 890256409153. The next prime is 890256409183. The reversal of 890256409156 is 651904652098.

The square root of 890256409156 is 943534.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 693106200900 + 197150208256 = 832530^2 + 444016^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 890256409097 and 890256409106.

It is not an unprimeable number, because it can be changed into a prime (890256409151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 32066281 + ... + 32094031.

Almost surely, 2^890256409156 is an apocalyptic number.

890256409156 is the 943534-th square number.

It is an amenable number.

890256409156 is a deficient number, since it is larger than the sum of its proper divisors (764786814041).

890256409156 is an frugal number, since it uses more digits than its factorization.

890256409156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55540 (or 27770 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 55.

The spelling of 890256409156 in words is "eight hundred ninety billion, two hundred fifty-six million, four hundred nine thousand, one hundred fifty-six".