280604740 has 48 divisors (see below), whose sum is σ = 642293568. Its totient is φ = 102351744.

The previous prime is 280604729. The next prime is 280604741. The reversal of 280604740 is 47406082.

It is a super-2 number, since 2×280604740² = 157478040220935200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (280604741) 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, 15079 + ... + 28081.

It is an arithmetic number, because the mean of its divisors is an integer number (13381116).

Almost surely, 2^280604740 is an apocalyptic number.

280604740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280604740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321146784).

280604740 is an abundant number, since it is smaller than the sum of its proper divisors (361688828).

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

280604740 is a wasteful number, since it uses less digits than its factorization.

280604740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13108 (or 13106 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 280604740 is about 16751.2608480675. The cubic root of 280604740 is about 654.6839101863.

The spelling of 280604740 in words is "two hundred eighty million, six hundred four thousand, seven hundred forty".