280620 has 36 divisors (see below), whose sum is σ = 851760. Its totient is φ = 74784.

The previous prime is 280613. The next prime is 280627. The reversal of 280620 is 26082.

280620 = T₁₁ + T₁₂ + ... + T₁₁₈.

280620 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (280613) and next prime (280627).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 280593 and 280602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280627) by changing a digit.

280620 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 600 + ... + 959.

It is an arithmetic number, because the mean of its divisors is an integer number (23660).

2²⁸⁰⁶²⁰ is an apocalyptic number.

280620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280620 is an abundant number, since it is smaller than the sum of its proper divisors (571140).

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

280620 is a wasteful number, since it uses less digits than its factorization.

280620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574 (or 1569 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 280620 is about 529.7357831976. The cubic root of 280620 is about 65.4695777764.

It can be divided in two parts, 280 and 620, that added together give a square (900 = 30²).

The spelling of 280620 in words is "two hundred eighty thousand, six hundred twenty".