88401891 has 8 divisors (see below), whose sum is σ = 117993744. Its totient is φ = 58872320.

The previous prime is 88401847. The next prime is 88401919. The reversal of 88401891 is 19810488.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 88401891 - 2⁷ = 88401763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (88401791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12150 + ... + 18011.

It is an arithmetic number, because the mean of its divisors is an integer number (14749218).

Almost surely, 2^88401891 is an apocalyptic number.

88401891 is a deficient number, since it is larger than the sum of its proper divisors (29591853).

88401891 is a wasteful number, since it uses less digits than its factorization.

88401891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31141.

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 88401891 is about 9402.2279806437. The cubic root of 88401891 is about 445.4721093134.

It can be divided in two parts, 8840 and 1891, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 88401891 in words is "eighty-eight million, four hundred one thousand, eight hundred ninety-one".