11990280 has 64 divisors (see below), whose sum is σ = 36250560. Its totient is φ = 3172608.

The previous prime is 11990261. The next prime is 11990281. The reversal of 11990280 is 8209911.

11990280 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (11990281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19254 + ... + 19866.

It is an arithmetic number, because the mean of its divisors is an integer number (566415).

Almost surely, 2^11990280 is an apocalyptic number.

11990280 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 11990280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18125280).

11990280 is an abundant number, since it is smaller than the sum of its proper divisors (24260280).

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

11990280 is a wasteful number, since it uses less digits than its factorization.

11990280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 786 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 11990280 is about 3462.6983697689. The cubic root of 11990280 is about 228.8810172441.

The spelling of 11990280 in words is "eleven million, nine hundred ninety thousand, two hundred eighty".