921028834 has 8 divisors (see below), whose sum is σ = 1507138128. Its totient is φ = 418649460.

The previous prime is 921028811. The next prime is 921028841. The reversal of 921028834 is 438820129.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×921028834² = 1696588226118799112, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 921028793 and 921028802.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20932452 + ... + 20932495.

It is an arithmetic number, because the mean of its divisors is an integer number (188392266).

Almost surely, 2^921028834 is an apocalyptic number.

921028834 is a deficient number, since it is larger than the sum of its proper divisors (586109294).

921028834 is a wasteful number, since it uses less digits than its factorization.

921028834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41864960.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 921028834 is about 30348.4568635705. The cubic root of 921028834 is about 972.9512391472.

The spelling of 921028834 in words is "nine hundred twenty-one million, twenty-eight thousand, eight hundred thirty-four".