821373850 has 48 divisors (see below), whose sum is σ = 1670518080. Its totient is φ = 297987200.

The previous prime is 821373827. The next prime is 821373851. The reversal of 821373850 is 58373128.

It is not an unprimeable number, because it can be changed into a prime (821373851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 275166 + ... + 278134.

It is an arithmetic number, because the mean of its divisors is an integer number (34802460).

Almost surely, 2^821373850 is an apocalyptic number.

821373850 is an abundant number, since it is smaller than the sum of its proper divisors (849144230).

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

821373850 is a wasteful number, since it uses less digits than its factorization.

821373850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3495 (or 3490 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 821373850 is about 28659.6205487791. The cubic root of 821373850 is about 936.5125983315.

The spelling of 821373850 in words is "eight hundred twenty-one million, three hundred seventy-three thousand, eight hundred fifty".