8257280 has 36 divisors (see below), whose sum is σ = 19781832. Its totient is φ = 3302400.

The previous prime is 8257261. The next prime is 8257307. The reversal of 8257280 is 827528.

8257280 = T₁₁₅ + T₁₁₆ + ... + T₃₇₀.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1946 + ... + 4505.

Almost surely, 2^8257280 is an apocalyptic number.

8257280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8257280 is an abundant number, since it is smaller than the sum of its proper divisors (11524552).

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

8257280 is an equidigital number, since it uses as much as digits as its factorization.

8257280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6472 (or 6458 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 8257280 is about 2873.5483291568. The cubic root of 8257280 is about 202.1214183602.

The spelling of 8257280 in words is "eight million, two hundred fifty-seven thousand, two hundred eighty".