823115478 has 8 divisors (see below), whose sum is σ = 1646230968. Its totient is φ = 274371824.

The previous prime is 823115477. The next prime is 823115479. The reversal of 823115478 is 874511328.

It is an interprime number because it is at equal distance from previous prime (823115477) and next prime (823115479).

It is a sphenic number, since it is the product of 3 distinct primes.

823115478 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823115477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68592951 + ... + 68592962.

It is an arithmetic number, because the mean of its divisors is an integer number (205778871).

Almost surely, 2^823115478 is an apocalyptic number.

823115478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

823115478 is a wasteful number, since it uses less digits than its factorization.

823115478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137185918.

The product of its digits is 53760, while the sum is 39.

The square root of 823115478 is about 28689.9891599840. The cubic root of 823115478 is about 937.1740531601.

The spelling of 823115478 in words is "eight hundred twenty-three million, one hundred fifteen thousand, four hundred seventy-eight".