826999650 has 144 divisors (see below), whose sum is σ = 2306578560. Its totient is φ = 212284800.

The previous prime is 826999609. The next prime is 826999687. The reversal of 826999650 is 56999628.

It is a super-2 number, since 2×826999650² = 1367856842200245000, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1528380 + ... + 1528920.

Almost surely, 2^826999650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 826999650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1153289280).

826999650 is an abundant number, since it is smaller than the sum of its proper divisors (1479578910).

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

826999650 is a wasteful number, since it uses less digits than its factorization.

826999650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The square root of 826999650 is about 28757.6016037499. The cubic root of 826999650 is about 938.6458735348.

The spelling of 826999650 in words is "eight hundred twenty-six million, nine hundred ninety-nine thousand, six hundred fifty".