11398520 has 32 divisors (see below), whose sum is σ = 29311200. Its totient is φ = 3907968.

The previous prime is 11398511. The next prime is 11398523. The reversal of 11398520 is 2589311.

11398520 = T₃₉₄ + T₃₉₅ + ... + T₅₀₅.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11398523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20075 + ... + 20634.

It is an arithmetic number, because the mean of its divisors is an integer number (915975).

Almost surely, 2^11398520 is an apocalyptic number.

11398520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11398520 is an abundant number, since it is smaller than the sum of its proper divisors (17912680).

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

11398520 is a wasteful number, since it uses less digits than its factorization.

11398520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40727 (or 40723 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 11398520 is about 3376.1694270282. The cubic root of 11398520 is about 225.0519715335.

The spelling of 11398520 in words is "eleven million, three hundred ninety-eight thousand, five hundred twenty".