11428020 has 48 divisors (see below), whose sum is σ = 35555520. Its totient is φ = 3047328.

The previous prime is 11428009. The next prime is 11428037. The reversal of 11428020 is 2082411.

It is a super-2 number, since 2×11428020² = 261199282240800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11427984 and 11428002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10042 + ... + 11121.

It is an arithmetic number, because the mean of its divisors is an integer number (740740).

Almost surely, 2^11428020 is an apocalyptic number.

11428020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11428020 is an abundant number, since it is smaller than the sum of its proper divisors (24127500).

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

11428020 is a wasteful number, since it uses less digits than its factorization.

11428020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21181 (or 21173 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 11428020 is about 3380.5354605447. The cubic root of 11428020 is about 225.2459532664.

The spelling of 11428020 in words is "eleven million, four hundred twenty-eight thousand, twenty".