813240810 has 48 divisors (see below), whose sum is σ = 2192744736. Its totient is φ = 216863568.

The previous prime is 813240787. The next prime is 813240821. The reversal of 813240810 is 18042318.

It is a super-2 number, since 2×813240810² = 1322721230098912200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164904 + ... + 169763.

It is an arithmetic number, because the mean of its divisors is an integer number (45682182).

Almost surely, 2^813240810 is an apocalyptic number.

813240810 is an abundant number, since it is smaller than the sum of its proper divisors (1379503926).

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

813240810 is a wasteful number, since it uses less digits than its factorization.

813240810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334689 (or 334677 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 813240810 is about 28517.3773338293. The cubic root of 813240810 is about 933.4113011680.

The spelling of 813240810 in words is "eight hundred thirteen million, two hundred forty thousand, eight hundred ten".