813573372 has 24 divisors (see below), whose sum is σ = 1910433616. Its totient is φ = 269463168.

The previous prime is 813573367. The next prime is 813573379. The reversal of 813573372 is 273375318.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 813573372.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813573379) 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, 214033 + ... + 217800.

Almost surely, 2^813573372 is an apocalyptic number.

It is an amenable number.

813573372 is an abundant number, since it is smaller than the sum of its proper divisors (1096860244).

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

813573372 is a wasteful number, since it uses less digits than its factorization.

813573372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431997 (or 431995 counting only the distinct ones).

The product of its digits is 105840, while the sum is 39.

The square root of 813573372 is about 28523.2076036339. The cubic root of 813573372 is about 933.5385184373.

The spelling of 813573372 in words is "eight hundred thirteen million, five hundred seventy-three thousand, three hundred seventy-two".