899440 has 20 divisors (see below), whose sum is σ = 2091384. Its totient is φ = 359744.

The previous prime is 899429. The next prime is 899447. The reversal of 899440 is 44998.

It is a tau number, because it is divible by the number of its divisors (20).

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 899396 and 899405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899447) 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 3 ways as a sum of consecutive naturals, for example, 5542 + ... + 5701.

2⁸⁹⁹⁴⁴⁰ is an apocalyptic number.

899440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

899440 is an abundant number, since it is smaller than the sum of its proper divisors (1191944).

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

899440 is a wasteful number, since it uses less digits than its factorization.

899440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11256 (or 11250 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 899440 is about 948.3881062097. The cubic root of 899440 is about 96.5289093408.

The spelling of 899440 in words is "eight hundred ninety-nine thousand, four hundred forty".