623213478 has 24 divisors (see below), whose sum is σ = 1350856416. Its totient is φ = 207651600.

The previous prime is 623213473. The next prime is 623213573. The reversal of 623213478 is 874312326.

It is a happy number.

623213478 is a `hidden beast` number, since 623 + 21 + 3 + 4 + 7 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623213473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49443 + ... + 60753.

It is an arithmetic number, because the mean of its divisors is an integer number (56285684).

Almost surely, 2^623213478 is an apocalyptic number.

623213478 is an abundant number, since it is smaller than the sum of its proper divisors (727642938).

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

623213478 is a wasteful number, since it uses less digits than its factorization.

623213478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14380 (or 14377 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 623213478 is about 24964.2439901552. The cubic root of 623213478 is about 854.1725533295.

The spelling of 623213478 in words is "six hundred twenty-three million, two hundred thirteen thousand, four hundred seventy-eight".