901818 has 12 divisors (see below), whose sum is σ = 1953978. Its totient is φ = 300600.

The previous prime is 901811. The next prime is 901819. The reversal of 901818 is 818109.

It can be written as a sum of positive squares in only one way, i.e., 870489 + 31329 = 933^2 + 177^2 .

It is an alternating number because its digits alternate between odd and even.

901818 is a modest number, since divided by 1818 gives 90 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 901791 and 901800.

It is not an unprimeable number, because it can be changed into a prime (901811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25033 + ... + 25068.

2⁹⁰¹⁸¹⁸ is an apocalyptic number.

901818 is an abundant number, since it is smaller than the sum of its proper divisors (1052160).

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

901818 is a wasteful number, since it uses less digits than its factorization.

901818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50109 (or 50106 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 901818 is about 949.6409847937. The cubic root of 901818 is about 96.6139043550.

The spelling of 901818 in words is "nine hundred one thousand, eight hundred eighteen".