813024638 has 4 divisors (see below), whose sum is σ = 1219536960. Its totient is φ = 406512318.

The previous prime is 813024601. The next prime is 813024647. The reversal of 813024638 is 836420318.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×813024638² = 1322018123990062088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 813024598 and 813024607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203256158 + ... + 203256161.

It is an arithmetic number, because the mean of its divisors is an integer number (304884240).

Almost surely, 2^813024638 is an apocalyptic number.

813024638 is a deficient number, since it is larger than the sum of its proper divisors (406512322).

813024638 is a wasteful number, since it uses less digits than its factorization.

813024638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406512321.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 813024638 is about 28513.5869016860. The cubic root of 813024638 is about 933.3285887797.

It can be divided in two parts, 8130 and 24638, that added together give a 15-th power (32768 = 2¹⁵).

The spelling of 813024638 in words is "eight hundred thirteen million, twenty-four thousand, six hundred thirty-eight".