11647920 has 40 divisors (see below), whose sum is σ = 36109296. Its totient is φ = 3106048.

The previous prime is 11647901. The next prime is 11647939. The reversal of 11647920 is 2974611.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11647901) and next prime (11647939).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24027 + ... + 24506.

Almost surely, 2^11647920 is an apocalyptic number.

11647920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11647920 is an abundant number, since it is smaller than the sum of its proper divisors (24461376).

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

11647920 is a wasteful number, since it uses less digits than its factorization.

11647920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48549 (or 48543 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 11647920 is about 3412.9049210313. The cubic root of 11647920 is about 226.6815253620.

The spelling of 11647920 in words is "eleven million, six hundred forty-seven thousand, nine hundred twenty".