901998 has 12 divisors (see below), whose sum is σ = 1954368. Its totient is φ = 300660.

The previous prime is 901997. The next prime is 902009. The reversal of 901998 is 899109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25038 + ... + 25073.

It is an arithmetic number, because the mean of its divisors is an integer number (162864).

2⁹⁰¹⁹⁹⁸ is an apocalyptic number.

901998 is an abundant number, since it is smaller than the sum of its proper divisors (1052370).

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

901998 is a wasteful number, since it uses less digits than its factorization.

901998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50119 (or 50116 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 901998 is about 949.7357527228. The cubic root of 901998 is about 96.6203318699.

The spelling of 901998 in words is "nine hundred one thousand, nine hundred ninety-eight".