280130040 has 96 divisors (see below), whose sum is σ = 932677200. Its totient is φ = 72875520.

The previous prime is 280130033. The next prime is 280130099. The reversal of 280130040 is 40031082.

It is a happy number.

It is a super-4 number, since 4×280130040⁴ (a number of 35 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 280129995 and 280130022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5271 + ... + 24249.

Almost surely, 2^280130040 is an apocalyptic number.

280130040 is a gapful number since it is divisible by the number (20) 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 280130040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (466338600).

280130040 is an abundant number, since it is smaller than the sum of its proper divisors (652547160).

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

280130040 is a wasteful number, since it uses less digits than its factorization.

280130040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19037 (or 19030 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 280130040 is about 16737.0857678390. The cubic root of 280130040 is about 654.3145248065.

The spelling of 280130040 in words is "two hundred eighty million, one hundred thirty thousand, forty".