918220828 has 36 divisors (see below), whose sum is σ = 1938204912. Its totient is φ = 372807360.

The previous prime is 918220817. The next prime is 918220829. The reversal of 918220828 is 828022819.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918220829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35313 + ... + 55528.

Almost surely, 2^918220828 is an apocalyptic number.

It is an amenable number.

918220828 is an abundant number, since it is smaller than the sum of its proper divisors (1019984084).

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

918220828 is a wasteful number, since it uses less digits than its factorization.

918220828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90890 (or 90869 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 918220828 is about 30302.1588009831. The cubic root of 918220828 is about 971.9614640912.

The spelling of 918220828 in words is "nine hundred eighteen million, two hundred twenty thousand, eight hundred twenty-eight".