928004015781 has 28 divisors (see below), whose sum is σ = 1391717424640. Its totient is φ = 618514655400.

The previous prime is 928004015753. The next prime is 928004015791. The reversal of 928004015781 is 187510400829.

928004015781 is a `hidden beast` number, since 92 + 80 + 0 + 401 + 5 + 7 + 81 = 666.

It is not a de Polignac number, because 928004015781 - 2¹⁰ = 928004014757 is a prime.

It is a super-2 number, since 2×928004015781² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (928004015791) 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 27 ways as a sum of consecutive naturals, for example, 2796060 + ... + 3110298.

Almost surely, 2^928004015781 is an apocalyptic number.

It is an amenable number.

928004015781 is a deficient number, since it is larger than the sum of its proper divisors (463713408859).

928004015781 is an equidigital number, since it uses as much as digits as its factorization.

928004015781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318308 (or 318293 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 928004015781 in words is "nine hundred twenty-eight billion, four million, fifteen thousand, seven hundred eighty-one".