88401581 has 16 divisors (see below), whose sum is σ = 98630784. Its totient is φ = 78802944.

The previous prime is 88401539. The next prime is 88401587. The reversal of 88401581 is 18510488.

It is a cyclic number.

It is not a de Polignac number, because 88401581 - 2¹⁴ = 88385197 is a prime.

It is a super-2 number, since 2×88401581² = 15629679046599122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88401587) 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, 40781 + ... + 42893.

It is an arithmetic number, because the mean of its divisors is an integer number (6164424).

Almost surely, 2^88401581 is an apocalyptic number.

It is an amenable number.

88401581 is a deficient number, since it is larger than the sum of its proper divisors (10229203).

88401581 is a wasteful number, since it uses less digits than its factorization.

88401581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2260.

The product of its (nonzero) digits is 10240, while the sum is 35.

The square root of 88401581 is about 9402.2114951750. The cubic root of 88401581 is about 445.4715885986.

The spelling of 88401581 in words is "eighty-eight million, four hundred one thousand, five hundred eighty-one".