890921568 has 48 divisors (see below), whose sum is σ = 2356554816. Its totient is φ = 294702720.

The previous prime is 890921539. The next prime is 890921569. The reversal of 890921568 is 865129098.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890921569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22846 + ... + 47997.

It is an arithmetic number, because the mean of its divisors is an integer number (49094892).

Almost surely, 2^890921568 is an apocalyptic number.

It is an amenable number.

890921568 is an abundant number, since it is smaller than the sum of its proper divisors (1465633248).

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

890921568 is a wasteful number, since it uses less digits than its factorization.

890921568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70987 (or 70979 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 890921568 is about 29848.3092988531. The cubic root of 890921568 is about 962.2320632283.

The spelling of 890921568 in words is "eight hundred ninety million, nine hundred twenty-one thousand, five hundred sixty-eight".