11720970 has 32 divisors (see below), whose sum is σ = 31256640. Its totient is φ = 3125520.

The previous prime is 11720903. The next prime is 11720977. The reversal of 11720970 is 7902711.

It is a super-2 number, since 2×11720970² = 274762275481800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11720977) 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 15 ways as a sum of consecutive naturals, for example, 21436 + ... + 21975.

It is an arithmetic number, because the mean of its divisors is an integer number (976770).

Almost surely, 2^11720970 is an apocalyptic number.

11720970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11720970 is an abundant number, since it is smaller than the sum of its proper divisors (19535670).

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

11720970 is a wasteful number, since it uses less digits than its factorization.

11720970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43427 (or 43421 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 27.

The square root of 11720970 is about 3423.5902208062. The cubic root of 11720970 is about 227.1544163369.

The spelling of 11720970 in words is "eleven million, seven hundred twenty thousand, nine hundred seventy".