920728423 has 8 divisors (see below), whose sum is σ = 930465216. Its totient is φ = 911004000.

The previous prime is 920728409. The next prime is 920728447. The reversal of 920728423 is 324827029.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 920728423 - 2²¹ = 918631271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920728223) 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 7 ways as a sum of consecutive naturals, for example, 268065 + ... + 271477.

It is an arithmetic number, because the mean of its divisors is an integer number (116308152).

Almost surely, 2^920728423 is an apocalyptic number.

920728423 is a deficient number, since it is larger than the sum of its proper divisors (9736793).

920728423 is a wasteful number, since it uses less digits than its factorization.

920728423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6185.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 920728423 is about 30343.5070978949. The cubic root of 920728423 is about 972.8454454855.

The spelling of 920728423 in words is "nine hundred twenty million, seven hundred twenty-eight thousand, four hundred twenty-three".