11571948 has 18 divisors (see below), whose sum is σ = 29251404. Its totient is φ = 3857304.

The previous prime is 11571941. The next prime is 11571949. The reversal of 11571948 is 84917511.

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: 321443 = 11571948 / (1 + 1 + 5 + 7 + 1 + 9 + 4 + 8).

It is not an unprimeable number, because it can be changed into a prime (11571941) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 160686 + ... + 160757.

It is an arithmetic number, because the mean of its divisors is an integer number (1625078).

Almost surely, 2^11571948 is an apocalyptic number.

11571948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11571948 is an abundant number, since it is smaller than the sum of its proper divisors (17679456).

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

11571948 is a wasteful number, since it uses less digits than its factorization.

11571948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321453 (or 321448 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 11571948 is about 3401.7566050498. The cubic root of 11571948 is about 226.1876166744.

The spelling of 11571948 in words is "eleven million, five hundred seventy-one thousand, nine hundred forty-eight".