280520442 has 32 divisors (see below), whose sum is σ = 638588160. Its totient is φ = 91225440.

The previous prime is 280520431. The next prime is 280520453. The reversal of 280520442 is 244025082.

It is a happy number.

280520442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (280520431) and next prime (280520453).

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

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, 61138 + ... + 65565.

It is an arithmetic number, because the mean of its divisors is an integer number (19955880).

Almost surely, 2^280520442 is an apocalyptic number.

280520442 is an abundant number, since it is smaller than the sum of its proper divisors (358067718).

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

280520442 is a wasteful number, since it uses less digits than its factorization.

280520442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126755 (or 126749 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 280520442 is about 16748.7444902596. The cubic root of 280520442 is about 654.6183445658.

The spelling of 280520442 in words is "two hundred eighty million, five hundred twenty thousand, four hundred forty-two".