11390820 has 96 divisors (see below), whose sum is σ = 37486848. Its totient is φ = 2529792.

The previous prime is 11390809. The next prime is 11390831. The reversal of 11390820 is 2809311.

It is an interprime number because it is at equal distance from previous prime (11390809) and next prime (11390831).

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, 15174 + ... + 15906.

It is an arithmetic number, because the mean of its divisors is an integer number (390488).

Almost surely, 2^11390820 is an apocalyptic number.

11390820 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 11390820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18743424).

11390820 is an abundant number, since it is smaller than the sum of its proper divisors (26096028).

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

11390820 is a wasteful number, since it uses less digits than its factorization.

11390820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 11390820 is about 3375.0288887653. The cubic root of 11390820 is about 225.0012839433.

The spelling of 11390820 in words is "eleven million, three hundred ninety thousand, eight hundred twenty".