280220148 has 60 divisors (see below), whose sum is σ = 788912740. Its totient is φ = 86220288.

The previous prime is 280220137. The next prime is 280220183. The reversal of 280220148 is 841022082.

280220148 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 135210384 + 145009764 = 11628^2 + 12042^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29053 + ... + 37476.

Almost surely, 2^280220148 is an apocalyptic number.

It is an amenable number.

280220148 is an abundant number, since it is smaller than the sum of its proper divisors (508692592).

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

280220148 is a wasteful number, since it uses less digits than its factorization.

280220148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66558 (or 66547 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 280220148 is about 16739.7774178751. Note that the first 3 decimals coincide. The cubic root of 280220148 is about 654.3846739565.

The spelling of 280220148 in words is "two hundred eighty million, two hundred twenty thousand, one hundred forty-eight".