821061948 has 24 divisors (see below), whose sum is σ = 2189498752. Its totient is φ = 234589104.

The previous prime is 821061947. The next prime is 821061973. The reversal of 821061948 is 849160128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821061947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4887190 + ... + 4887357.

Almost surely, 2^821061948 is an apocalyptic number.

It is an amenable number.

821061948 is an abundant number, since it is smaller than the sum of its proper divisors (1368436804).

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

821061948 is a wasteful number, since it uses less digits than its factorization.

821061948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9774561 (or 9774559 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 821061948 is about 28654.1785434516. The cubic root of 821061948 is about 936.3940420316.

The spelling of 821061948 in words is "eight hundred twenty-one million, sixty-one thousand, nine hundred forty-eight".