918977020 has 96 divisors (see below), whose sum is σ = 2166474240. Its totient is φ = 325140480.

The previous prime is 918976999. The next prime is 918977023. The reversal of 918977020 is 20779819.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918977023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 910276 + ... + 911284.

It is an arithmetic number, because the mean of its divisors is an integer number (22567440).

Almost surely, 2^918977020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 918977020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1083237120).

918977020 is an abundant number, since it is smaller than the sum of its proper divisors (1247497220).

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

918977020 is a wasteful number, since it uses less digits than its factorization.

918977020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175 (or 1173 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 918977020 is about 30314.6337599516. The cubic root of 918977020 is about 972.2282074093.

The spelling of 918977020 in words is "nine hundred eighteen million, nine hundred seventy-seven thousand, twenty".