201391488 has 128 divisors (see below), whose sum is σ = 625872000. Its totient is φ = 63576576.

The previous prime is 201391483. The next prime is 201391493. The reversal of 201391488 is 884193102.

It is an interprime number because it is at equal distance from previous prime (201391483) and next prime (201391493).

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201391483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64131 + ... + 67197.

It is an arithmetic number, because the mean of its divisors is an integer number (4889625).

Almost surely, 2^201391488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201391488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312936000).

201391488 is an abundant number, since it is smaller than the sum of its proper divisors (424480512).

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

201391488 is a wasteful number, since it uses less digits than its factorization.

201391488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109 (or 3091 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 201391488 is about 14191.2468796790. The cubic root of 201391488 is about 586.1566596106.

The spelling of 201391488 in words is "two hundred one million, three hundred ninety-one thousand, four hundred eighty-eight".