823815412 has 48 divisors (see below), whose sum is σ = 1708680960. Its totient is φ = 340042752.

The previous prime is 823815409. The next prime is 823815463. The reversal of 823815412 is 214518328.

It is a happy number.

823815412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (15360) is a multiple of the sum of its prime factors (2560).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407428 + ... + 409444.

It is an arithmetic number, because the mean of its divisors is an integer number (35597520).

Almost surely, 2^823815412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 823815412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (854340480).

823815412 is an abundant number, since it is smaller than the sum of its proper divisors (884865548).

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

823815412 is a wasteful number, since it uses less digits than its factorization.

823815412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560 (or 2558 counting only the distinct ones).

The product of its digits is 15360, while the sum is 34.

The square root of 823815412 is about 28702.1847948897. The cubic root of 823815412 is about 937.4396190326.

The spelling of 823815412 in words is "eight hundred twenty-three million, eight hundred fifteen thousand, four hundred twelve".