718432128 has 96 divisors (see below), whose sum is σ = 2095928640. Its totient is φ = 236169216.

The previous prime is 718432093. The next prime is 718432139. The reversal of 718432128 is 821234817.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×718432128² = 1032289445085216768, which contains 22 as substring.

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 = 718432092 and 718432101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79825 + ... + 88367.

It is an arithmetic number, because the mean of its divisors is an integer number (21832590).

Almost surely, 2^718432128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 718432128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1047964320).

718432128 is an abundant number, since it is smaller than the sum of its proper divisors (1377496512).

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

718432128 is a wasteful number, since it uses less digits than its factorization.

718432128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8636 (or 8621 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 718432128 is about 26803.5842379336. The cubic root of 718432128 is about 895.6298960396.

The spelling of 718432128 in words is "seven hundred eighteen million, four hundred thirty-two thousand, one hundred twenty-eight".