11897280 has 224 divisors, whose sum is σ = 44988480. Its totient is φ = 2985984.

The previous prime is 11897267. The next prime is 11897299. The reversal of 11897280 is 8279811.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 306 × 270 × 144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 699832 + ... + 699848.

Almost surely, 2^11897280 is an apocalyptic number.

11897280 is a gapful number since it is divisible by the number (10) 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 11897280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22494240).

11897280 is an abundant number, since it is smaller than the sum of its proper divisors (33091200).

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

11897280 is an frugal number, since it uses more digits than its factorization.

11897280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 11897280 is about 3449.2433952970. The cubic root of 11897280 is about 228.2877253939.

The spelling of 11897280 in words is "eleven million, eight hundred ninety-seven thousand, two hundred eighty".