1088401581 has 12 divisors (see below), whose sum is σ = 1626347580. Its totient is φ = 700580160.

The previous prime is 1088401571. The next prime is 1088401609. The reversal of 1088401581 is 1851048801.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 745781481 + 342620100 = 27309^2 + 18510^2 .

It is not a de Polignac number, because 1088401581 - 2¹⁰ = 1088400557 is a prime.

It is a super-2 number, since 2×1088401581² = 2369236003046599122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1088401571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2084800 + ... + 2085321.

It is an arithmetic number, because the mean of its divisors is an integer number (135528965).

Almost surely, 2^1088401581 is an apocalyptic number.

It is an amenable number.

1088401581 is a deficient number, since it is larger than the sum of its proper divisors (537945999).

1088401581 is a wasteful number, since it uses less digits than its factorization.

1088401581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170156 (or 4170153 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 36.

The square root of 1088401581 is about 32990.9317995112. The cubic root of 1088401581 is about 1028.6391620987.

The spelling of 1088401581 in words is "one billion, eighty-eight million, four hundred one thousand, five hundred eighty-one".