88431840 has 288 divisors, whose sum is σ = 357267456. Its totient is φ = 19491840.

The previous prime is 88431839. The next prime is 88431853. The reversal of 88431840 is 4813488.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 88431795 and 88431804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 312339 + ... + 312621.

It is an arithmetic number, because the mean of its divisors is an integer number (1240512).

Almost surely, 2^88431840 is an apocalyptic number.

88431840 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 88431840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178633728).

88431840 is an abundant number, since it is smaller than the sum of its proper divisors (268835616).

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

88431840 is a wasteful number, since it uses less digits than its factorization.

88431840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 88431840 is about 9403.8205002010. The cubic root of 88431840 is about 445.5224096623.

The spelling of 88431840 in words is "eighty-eight million, four hundred thirty-one thousand, eight hundred forty".