4280129840 has 80 divisors (see below), whose sum is σ = 11441267712. Its totient is φ = 1458653952.

The previous prime is 4280129813. The next prime is 4280129873. The reversal of 4280129840 is 489210824.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×4280129840² = 36639022894516851200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4280129794 and 4280129803.

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, 70637 + ... + 116403.

Almost surely, 2^4280129840 is an apocalyptic number.

4280129840 is a gapful number since it is divisible by the number (40) 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 4280129840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5720633856).

4280129840 is an abundant number, since it is smaller than the sum of its proper divisors (7161137872).

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

4280129840 is a wasteful number, since it uses less digits than its factorization.

4280129840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45954 (or 45948 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 4280129840 is about 65422.7012588138. The cubic root of 4280129840 is about 1623.6246938635.

The spelling of 4280129840 in words is "four billion, two hundred eighty million, one hundred twenty-nine thousand, eight hundred forty".