813718890 has 48 divisors (see below), whose sum is σ = 2227024800. Its totient is φ = 205570656.

The previous prime is 813718877. The next prime is 813718891. The reversal of 813718890 is 98817318.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (813718891) 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, 236220 + ... + 239639.

It is an arithmetic number, because the mean of its divisors is an integer number (46396350).

Almost surely, 2^813718890 is an apocalyptic number.

813718890 is an abundant number, since it is smaller than the sum of its proper divisors (1413305910).

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

813718890 is a wasteful number, since it uses less digits than its factorization.

813718890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475891 (or 475888 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 813718890 is about 28525.7583597702. The cubic root of 813718890 is about 933.5941735527.

The spelling of 813718890 in words is "eight hundred thirteen million, seven hundred eighteen thousand, eight hundred ninety".