928426781 has 4 divisors (see below), whose sum is σ = 958376064. Its totient is φ = 898477500.

The previous prime is 928426777. The next prime is 928426787. The reversal of 928426781 is 187624829.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 928426781 - 2² = 928426777 is a prime.

It is a super-2 number, since 2×928426781² = 1723952575356043922, which 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 (928426787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14974595 + ... + 14974656.

It is an arithmetic number, because the mean of its divisors is an integer number (239594016).

Almost surely, 2^928426781 is an apocalyptic number.

It is an amenable number.

928426781 is a deficient number, since it is larger than the sum of its proper divisors (29949283).

928426781 is a wasteful number, since it uses less digits than its factorization.

928426781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29949282.

The product of its digits is 387072, while the sum is 47.

The square root of 928426781 is about 30470.0965046060. The cubic root of 928426781 is about 975.5492959143.

The spelling of 928426781 in words is "nine hundred twenty-eight million, four hundred twenty-six thousand, seven hundred eighty-one".