823678464 has 80 divisors (see below), whose sum is σ = 2507839488. Its totient is φ = 235333632.

The previous prime is 823678433. The next prime is 823678469. The reversal of 823678464 is 464876328.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823678469) 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, 27552 + ... + 49055.

Almost surely, 2^823678464 is an apocalyptic number.

823678464 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

823678464 is an abundant number, since it is smaller than the sum of its proper divisors (1684161024).

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

823678464 is an equidigital number, since it uses as much as digits as its factorization.

823678464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76635 (or 76619 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 48.

The square root of 823678464 is about 28699.7990236866. The cubic root of 823678464 is about 937.3876706659.

The spelling of 823678464 in words is "eight hundred twenty-three million, six hundred seventy-eight thousand, four hundred sixty-four".