11918620 has 24 divisors (see below), whose sum is σ = 28605024. Its totient is φ = 4086336.

The previous prime is 11918617. The next prime is 11918629. The reversal of 11918620 is 2681911.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11918629) 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, 42427 + ... + 42706.

It is an arithmetic number, because the mean of its divisors is an integer number (1191876).

Almost surely, 2^11918620 is an apocalyptic number.

11918620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11918620 is an abundant number, since it is smaller than the sum of its proper divisors (16686404).

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

11918620 is a wasteful number, since it uses less digits than its factorization.

11918620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85149 (or 85147 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 11918620 is about 3452.3354414077. The cubic root of 11918620 is about 228.4241361313.

The spelling of 11918620 in words is "eleven million, nine hundred eighteen thousand, six hundred twenty".