280475120 has 40 divisors (see below), whose sum is σ = 653130816. Its totient is φ = 112013568.

The previous prime is 280475119. The next prime is 280475123. The reversal of 280475120 is 21574082.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280475123) 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, 56249 + ... + 61031.

Almost surely, 2^280475120 is an apocalyptic number.

280475120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280475120 is an abundant number, since it is smaller than the sum of its proper divisors (372655696).

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

280475120 is a wasteful number, since it uses less digits than its factorization.

280475120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5529 (or 5523 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 280475120 is about 16747.3914386689. The cubic root of 280475120 is about 654.5830884179.

The spelling of 280475120 in words is "two hundred eighty million, four hundred seventy-five thousand, one hundred twenty".