88551440 has 40 divisors (see below), whose sum is σ = 208212120. Its totient is φ = 35019776.

The previous prime is 88551439. The next prime is 88551451. The reversal of 88551440 is 4415588.

It can be written as a sum of positive squares in 4 ways, for example, as 1763584 + 86787856 = 1328^2 + 9316^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 88551440.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 902 + ... + 13338.

It is an arithmetic number, because the mean of its divisors is an integer number (5205303).

Almost surely, 2^88551440 is an apocalyptic number.

88551440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 88551440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104106060).

88551440 is an abundant number, since it is smaller than the sum of its proper divisors (119660680).

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

88551440 is a wasteful number, since it uses less digits than its factorization.

88551440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12539 (or 12533 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 88551440 is about 9410.1774691023. The cubic root of 88551440 is about 445.7231687125.

It can be divided in two parts, 885 and 51440, that added together give a palindrome (52325).

The spelling of 88551440 in words is "eighty-eight million, five hundred fifty-one thousand, four hundred forty".