11909628 has 18 divisors (see below), whose sum is σ = 30104984. Its totient is φ = 3969864.

The previous prime is 11909621. The next prime is 11909647. The reversal of 11909628 is 82690911.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 330823 = 11909628 / (1 + 1 + 9 + 0 + 9 + 6 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 11909592 and 11909601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11909621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 165376 + ... + 165447.

Almost surely, 2^11909628 is an apocalyptic number.

11909628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11909628 is an abundant number, since it is smaller than the sum of its proper divisors (18195356).

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

11909628 is a wasteful number, since it uses less digits than its factorization.

11909628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330833 (or 330828 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 11909628 is about 3451.0328888610. The cubic root of 11909628 is about 228.3666768339.

The spelling of 11909628 in words is "eleven million, nine hundred nine thousand, six hundred twenty-eight".