280312245 has 40 divisors (see below), whose sum is σ = 511045920. Its totient is φ = 146953440.

The previous prime is 280312229. The next prime is 280312273. The reversal of 280312245 is 542213082.

It is not a de Polignac number, because 280312245 - 2⁴ = 280312229 is a prime.

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 39 ways as a sum of consecutive naturals, for example, 18030 + ... + 29760.

It is an arithmetic number, because the mean of its divisors is an integer number (12776148).

Almost surely, 2^280312245 is an apocalyptic number.

It is an amenable number.

280312245 is a deficient number, since it is larger than the sum of its proper divisors (230733675).

280312245 is a wasteful number, since it uses less digits than its factorization.

280312245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11807 (or 11798 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 280312245 is about 16742.5280349175. The cubic root of 280312245 is about 654.4563560067.

It can be divided in two parts, 28031 and 2245, that added together give a square (30276 = 174²).

The spelling of 280312245 in words is "two hundred eighty million, three hundred twelve thousand, two hundred forty-five".