654401826 has 48 divisors (see below), whose sum is σ = 1542111480. Its totient is φ = 199353600.

The previous prime is 654401801. The next prime is 654401831. The reversal of 654401826 is 628104456.

It can be written as a sum of positive squares in 4 ways, for example, as 477378801 + 177023025 = 21849^2 + 13305^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9790 + ... + 37478.

Almost surely, 2^654401826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654401826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (771055740).

654401826 is an abundant number, since it is smaller than the sum of its proper divisors (887709654).

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

654401826 is a wasteful number, since it uses less digits than its factorization.

654401826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27811 (or 27808 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 654401826 is about 25581.2788186986. The cubic root of 654401826 is about 868.1901098098.

The spelling of 654401826 in words is "six hundred fifty-four million, four hundred one thousand, eight hundred twenty-six".