1105661620 has 48 divisors (see below), whose sum is σ = 2703673728. Its totient is φ = 371928960.

The previous prime is 1105661611. The next prime is 1105661621. The reversal of 1105661620 is 261665011.

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 (1105661621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67086 + ... + 81925.

It is an arithmetic number, because the mean of its divisors is an integer number (56326536).

Almost surely, 2^1105661620 is an apocalyptic number.

1105661620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1105661620 is an abundant number, since it is smaller than the sum of its proper divisors (1598012108).

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

1105661620 is a wasteful number, since it uses less digits than its factorization.

1105661620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149080 (or 149078 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1105661620 is about 33251.4904929087. The cubic root of 1105661620 is about 1034.0481092314.

The spelling of 1105661620 in words is "one billion, one hundred five million, six hundred sixty-one thousand, six hundred twenty".