428722755 has 8 divisors (see below), whose sum is σ = 685956432. Its totient is φ = 228652128.

The previous prime is 428722753. The next prime is 428722757. The reversal of 428722755 is 557227824.

It is an interprime number because it is at equal distance from previous prime (428722753) and next prime (428722757).

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

It is not a de Polignac number, because 428722755 - 2¹ = 428722753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428722753) 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, 14290744 + ... + 14290773.

It is an arithmetic number, because the mean of its divisors is an integer number (85744554).

Almost surely, 2^428722755 is an apocalyptic number.

428722755 is a deficient number, since it is larger than the sum of its proper divisors (257233677).

428722755 is a wasteful number, since it uses less digits than its factorization.

428722755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28581525.

The product of its digits is 313600, while the sum is 42.

The square root of 428722755 is about 20705.6213381777. The cubic root of 428722755 is about 754.0361690441.

The spelling of 428722755 in words is "four hundred twenty-eight million, seven hundred twenty-two thousand, seven hundred fifty-five".