8429280 has 96 divisors (see below), whose sum is σ = 28141344. Its totient is φ = 2113536.

The previous prime is 8429257. The next prime is 8429329. The reversal of 8429280 is 829248.

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

It is a super-2 number, since 2×8429280² = 142105522636800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7644 + ... + 8676.

It is an arithmetic number, because the mean of its divisors is an integer number (293139).

Almost surely, 2^8429280 is an apocalyptic number.

8429280 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 8429280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14070672).

8429280 is an abundant number, since it is smaller than the sum of its proper divisors (19712064).

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

8429280 is a wasteful number, since it uses less digits than its factorization.

8429280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068 (or 1060 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 8429280 is about 2903.3222349577. The cubic root of 8429280 is about 203.5151886149.

The spelling of 8429280 in words is "eight million, four hundred twenty-nine thousand, two hundred eighty".