821090376 has 48 divisors (see below), whose sum is σ = 2271110400. Its totient is φ = 267872352.

The previous prime is 821090359. The next prime is 821090383. The reversal of 821090376 is 673090128.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 821090376.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117936 + ... + 124703.

It is an arithmetic number, because the mean of its divisors is an integer number (47314800).

Almost surely, 2^821090376 is an apocalyptic number.

It is an amenable number.

821090376 is an abundant number, since it is smaller than the sum of its proper divisors (1450020024).

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

821090376 is a wasteful number, since it uses less digits than its factorization.

821090376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242698 (or 242691 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 821090376 is about 28654.6745924640. The cubic root of 821090376 is about 936.4048489720.

The spelling of 821090376 in words is "eight hundred twenty-one million, ninety thousand, three hundred seventy-six".