823624340 has 72 divisors (see below), whose sum is σ = 2194934112. Its totient is φ = 256710720.

The previous prime is 823624303. The next prime is 823624349. The reversal of 823624340 is 43426328.

It is a junction number, because it is equal to n+sod(n) for n = 823624297 and 823624306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823624349) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27422 + ... + 48981.

It is an arithmetic number, because the mean of its divisors is an integer number (30485196).

Almost surely, 2^823624340 is an apocalyptic number.

It is an amenable number.

823624340 is an abundant number, since it is smaller than the sum of its proper divisors (1371309772).

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

823624340 is a wasteful number, since it uses less digits than its factorization.

823624340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76437 (or 76428 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 823624340 is about 28698.8560747637. The cubic root of 823624340 is about 937.3671382681.

The spelling of 823624340 in words is "eight hundred twenty-three million, six hundred twenty-four thousand, three hundred forty".