920243556 has 36 divisors (see below), whose sum is σ = 2401211904. Its totient is φ = 296852400.

The previous prime is 920243543. The next prime is 920243557. The reversal of 920243556 is 655342029.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 920243556.

It is not an unprimeable number, because it can be changed into a prime (920243557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 411180 + ... + 413411.

Almost surely, 2^920243556 is an apocalyptic number.

It is an amenable number.

920243556 is an abundant number, since it is smaller than the sum of its proper divisors (1480968348).

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

920243556 is a wasteful number, since it uses less digits than its factorization.

920243556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824632 (or 824627 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 920243556 is about 30335.5164122848. The cubic root of 920243556 is about 972.6746446768.

The spelling of 920243556 in words is "nine hundred twenty million, two hundred forty-three thousand, five hundred fifty-six".