202991000 has 64 divisors (see below), whose sum is σ = 486682560. Its totient is φ = 79200000.

The previous prime is 202990993. The next prime is 202991021. The reversal of 202991000 is 199202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38525 + ... + 43475.

It is an arithmetic number, because the mean of its divisors is an integer number (7604415).

Almost surely, 2^202991000 is an apocalyptic number.

202991000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202991000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243341280).

202991000 is an abundant number, since it is smaller than the sum of its proper divisors (283691560).

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

202991000 is a wasteful number, since it uses less digits than its factorization.

202991000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5013 (or 4999 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 202991000 is about 14247.4910071914. The cubic root of 202991000 is about 587.7043803779.

The spelling of 202991000 in words is "two hundred two million, nine hundred ninety-one thousand".