280862901225 has 45 divisors (see below), whose sum is σ = 520299360757. Its totient is φ = 149780828160.

The previous prime is 280862901203. The next prime is 280862901239. The reversal of 280862901225 is 522109268082.

The square root of 280862901225 is 529965.

It is a perfect power (a square), and thus also a powerful number.

280862901225 is a `hidden beast` number, since 2 + 8 + 0 + 8 + 629 + 0 + 12 + 2 + 5 = 666.

280862901225 is digitally balanced in base 4, 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 4 ways, for example, as 1153077849 + 279709823376 = 33957^2 + 528876^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 280862901225 - 2⁷ = 280862901097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 23842537 + ... + 23854313.

Almost surely, 2^280862901225 is an apocalyptic number.

280862901225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

280862901225 is the 529965-th square number.

280862901225 is the 264983-rd centered octagonal number.

It is an amenable number.

280862901225 is a deficient number, since it is larger than the sum of its proper divisors (239436459532).

280862901225 is an frugal number, since it uses more digits than its factorization.

280862901225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23576 (or 11785 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 280862901225 in words is "two hundred eighty billion, eight hundred sixty-two million, nine hundred one thousand, two hundred twenty-five".