928220257 has 8 divisors (see below), whose sum is σ = 941276672. Its totient is φ = 915235200.

The previous prime is 928220239. The next prime is 928220263. The reversal of 928220257 is 752022829.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-928220257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (928220287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8632 + ... + 43942.

It is an arithmetic number, because the mean of its divisors is an integer number (117659584).

Almost surely, 2^928220257 is an apocalyptic number.

928220257 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

It is an amenable number.

928220257 is a deficient number, since it is larger than the sum of its proper divisors (13056415).

928220257 is a wasteful number, since it uses less digits than its factorization.

928220257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35679.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 928220257 is about 30466.7073540939. The cubic root of 928220257 is about 975.4769551591.

The spelling of 928220257 in words is "nine hundred twenty-eight million, two hundred twenty thousand, two hundred fifty-seven".