11720628 has 36 divisors (see below), whose sum is σ = 29786848. Its totient is φ = 3885840.

The previous prime is 11720627. The next prime is 11720641. The reversal of 11720628 is 82602711.

11720628 is a `hidden beast` number, since 1 + 17 + 20 + 628 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11720627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6825 + ... + 8367.

Almost surely, 2^11720628 is an apocalyptic number.

11720628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11720628 is an abundant number, since it is smaller than the sum of its proper divisors (18066220).

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

11720628 is a wasteful number, since it uses less digits than its factorization.

11720628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764 (or 1759 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 11720628 is about 3423.5402728754. The cubic root of 11720628 is about 227.1522069758.

The spelling of 11720628 in words is "eleven million, seven hundred twenty thousand, six hundred twenty-eight".