921219464 has 48 divisors (see below), whose sum is σ = 1909909260. Its totient is φ = 416240000.

The previous prime is 921219461. The next prime is 921219473. The reversal of 921219464 is 464912129.

It can be written as a sum of positive squares in 2 ways, for example, as 656896900 + 264322564 = 25630^2 + 16258^2 .

It is not an unprimeable number, because it can be changed into a prime (921219461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164714 + ... + 170214.

Almost surely, 2^921219464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 921219464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (954954630).

921219464 is an abundant number, since it is smaller than the sum of its proper divisors (988689796).

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

921219464 is a wasteful number, since it uses less digits than its factorization.

921219464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5702 (or 5687 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 921219464 is about 30351.5973879465. The cubic root of 921219464 is about 973.0183600643.

The spelling of 921219464 in words is "nine hundred twenty-one million, two hundred nineteen thousand, four hundred sixty-four".