899970 has 32 divisors (see below), whose sum is σ = 2185920. Its totient is φ = 237120.

The previous prime is 899939. The next prime is 899971. The reversal of 899970 is 79998.

It is a happy number.

It is an Ulam number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (899971) 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 15 ways as a sum of consecutive naturals, for example, 3816 + ... + 4044.

It is an arithmetic number, because the mean of its divisors is an integer number (68310).

2⁸⁹⁹⁹⁷⁰ is an apocalyptic number.

899970 is an abundant number, since it is smaller than the sum of its proper divisors (1285950).

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

899970 is a wasteful number, since it uses less digits than its factorization.

899970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370.

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 899970 is about 948.6674865304. The cubic root of 899970 is about 96.5478656827.

The spelling of 899970 in words is "eight hundred ninety-nine thousand, nine hundred seventy".