280023480 has 288 divisors, whose sum is σ = 1041571440. Its totient is φ = 67184640.

The previous prime is 280023451. The next prime is 280023493. The reversal of 280023480 is 84320082.

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 71 ways as a sum of consecutive naturals, for example, 2886792 + ... + 2886888.

Almost surely, 2^280023480 is an apocalyptic number.

280023480 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 280023480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (520785720).

280023480 is an abundant number, since it is smaller than the sum of its proper divisors (761547960).

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

280023480 is an equidigital number, since it uses as much as digits as its factorization.

280023480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 280023480 is about 16733.9021151673. The cubic root of 280023480 is about 654.2315483449.

The spelling of 280023480 in words is "two hundred eighty million, twenty-three thousand, four hundred eighty".