280380632 has 32 divisors (see below), whose sum is σ = 615474720. Its totient is φ = 117231360.

The previous prime is 280380623. The next prime is 280380637. The reversal of 280380632 is 236083082.

It is a happy number.

It is a super-2 number, since 2×280380632² = 157226597601438848, which contains 22 as substring.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280380637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58763 + ... + 63354.

It is an arithmetic number, because the mean of its divisors is an integer number (19233585).

Almost surely, 2^280380632 is an apocalyptic number.

It is an amenable number.

280380632 is an abundant number, since it is smaller than the sum of its proper divisors (335094088).

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

280380632 is a wasteful number, since it uses less digits than its factorization.

280380632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122171 (or 122167 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 280380632 is about 16744.5702244041. The cubic root of 280380632 is about 654.5095736457.

The spelling of 280380632 in words is "two hundred eighty million, three hundred eighty thousand, six hundred thirty-two".