818227740 has 48 divisors (see below), whose sum is σ = 2499315840. Its totient is φ = 198358080.

The previous prime is 818227717. The next prime is 818227757. The reversal of 818227740 is 47722818.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 619210 + ... + 620529.

It is an arithmetic number, because the mean of its divisors is an integer number (52069080).

Almost surely, 2^818227740 is an apocalyptic number.

It is an amenable number.

818227740 is an abundant number, since it is smaller than the sum of its proper divisors (1681088100).

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

818227740 is a wasteful number, since it uses less digits than its factorization.

818227740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239762 (or 1239760 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 39.

The square root of 818227740 is about 28604.6803862585. The cubic root of 818227740 is about 935.3153597020.

The spelling of 818227740 in words is "eight hundred eighteen million, two hundred twenty-seven thousand, seven hundred forty".