890286636640 has 48 divisors (see below), whose sum is σ = 2116699067952. Its totient is φ = 353846398464.

The previous prime is 890286636599. The next prime is 890286636647. The reversal of 890286636640 is 46636682098.

It is a super-2 number, since 2×890286636640² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890286636647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17695554 + ... + 17745793.

It is an arithmetic number, because the mean of its divisors is an integer number (44097897249).

Almost surely, 2^890286636640 is an apocalyptic number.

890286636640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

890286636640 is an abundant number, since it is smaller than the sum of its proper divisors (1226412431312).

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

890286636640 is a wasteful number, since it uses less digits than its factorization.

890286636640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35441519 (or 35441511 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 58.

The spelling of 890286636640 in words is "eight hundred ninety billion, two hundred eighty-six million, six hundred thirty-six thousand, six hundred forty".