201690258 has 64 divisors (see below), whose sum is σ = 505543680. Its totient is φ = 52113600.

The previous prime is 201690199. The next prime is 201690271. The reversal of 201690258 is 852096102.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96448 + ... + 98516.

It is an arithmetic number, because the mean of its divisors is an integer number (7899120).

Almost surely, 2^201690258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201690258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252771840).

201690258 is an abundant number, since it is smaller than the sum of its proper divisors (303853422).

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

201690258 is a wasteful number, since it uses less digits than its factorization.

201690258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 201690258 is about 14201.7695376316. The cubic root of 201690258 is about 586.4463764150.

The spelling of 201690258 in words is "two hundred one million, six hundred ninety thousand, two hundred fifty-eight".