921439850 has 12 divisors (see below), whose sum is σ = 1713878214. Its totient is φ = 368575920.

The previous prime is 921439847. The next prime is 921439859. The reversal of 921439850 is 58934129.

It can be written as a sum of positive squares in 3 ways, for example, as 653364721 + 268075129 = 25561^2 + 16373^2 .

It is a junction number, because it is equal to n+sod(n) for n = 921439798 and 921439807.

It is not an unprimeable number, because it can be changed into a prime (921439859) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9214349 + ... + 9214448.

Almost surely, 2^921439850 is an apocalyptic number.

921439850 is a deficient number, since it is larger than the sum of its proper divisors (792438364).

921439850 is a wasteful number, since it uses less digits than its factorization.

921439850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18428809 (or 18428804 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 921439850 is about 30355.2277211027. The cubic root of 921439850 is about 973.0959465442.

The spelling of 921439850 in words is "nine hundred twenty-one million, four hundred thirty-nine thousand, eight hundred fifty".