280047730 has 32 divisors (see below), whose sum is σ = 514410624. Its totient is φ = 109748736.

The previous prime is 280047683. The next prime is 280047731. The reversal of 280047730 is 37740082.

It is a junction number, because it is equal to n+sod(n) for n = 280047692 and 280047701.

It is not an unprimeable number, because it can be changed into a prime (280047731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98509 + ... + 101311.

It is an arithmetic number, because the mean of its divisors is an integer number (16075332).

Almost surely, 2^280047730 is an apocalyptic number.

280047730 is a deficient number, since it is larger than the sum of its proper divisors (234362894).

280047730 is a wasteful number, since it uses less digits than its factorization.

280047730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 280047730 is about 16734.6266764455. The cubic root of 280047730 is about 654.2504332578.

It can be divided in two parts, 280047 and 730, that multiplied together give a triangular number (204434310 = T₂₀₂₂₀).

The spelling of 280047730 in words is "two hundred eighty million, forty-seven thousand, seven hundred thirty".