11947128 has 32 divisors (see below), whose sum is σ = 29990400. Its totient is φ = 3966048.

The previous prime is 11947127. The next prime is 11947129. The reversal of 11947128 is 82174911.

11947128 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 an interprime number because it is at equal distance from previous prime (11947127) and next prime (11947129).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11947123) 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, 5913 + ... + 7671.

It is an arithmetic number, because the mean of its divisors is an integer number (937200).

Almost surely, 2^11947128 is an apocalyptic number.

It is an amenable number.

11947128 is an abundant number, since it is smaller than the sum of its proper divisors (18043272).

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

11947128 is a wasteful number, since it uses less digits than its factorization.

11947128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051 (or 2047 counting only the distinct ones).

The product of its digits is 4032, while the sum is 33.

The square root of 11947128 is about 3456.4617747055. The cubic root of 11947128 is about 228.6061127426.

The spelling of 11947128 in words is "eleven million, nine hundred forty-seven thousand, one hundred twenty-eight".