281601090 has 128 divisors (see below), whose sum is σ = 837216000. Its totient is φ = 66935808.

The previous prime is 281601053. The next prime is 281601113. The reversal of 281601090 is 90106182.

281601090 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 85596 + ... + 88824.

It is an arithmetic number, because the mean of its divisors is an integer number (6540750).

Almost surely, 2^281601090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281601090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418608000).

281601090 is an abundant number, since it is smaller than the sum of its proper divisors (555614910).

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

281601090 is a wasteful number, since it uses less digits than its factorization.

281601090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281 (or 3275 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 281601090 is about 16780.9740480104. The cubic root of 281601090 is about 655.4578621804.

The spelling of 281601090 in words is "two hundred eighty-one million, six hundred one thousand, ninety".