428440178 has 8 divisors (see below), whose sum is σ = 648347868. Its totient is φ = 212324224.

The previous prime is 428440169. The next prime is 428440193. The reversal of 428440178 is 871044824.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 275991769 + 152448409 = 16613^2 + 12347^2 .

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

It is a super-2 number, since 2×428440178² = 367121972249343368, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947651 + ... + 948102.

Almost surely, 2^428440178 is an apocalyptic number.

428440178 is a deficient number, since it is larger than the sum of its proper divisors (219907690).

428440178 is a wasteful number, since it uses less digits than its factorization.

428440178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895868.

The product of its (nonzero) digits is 57344, while the sum is 38.

The square root of 428440178 is about 20698.7965350645. The cubic root of 428440178 is about 753.8704674678.

The spelling of 428440178 in words is "four hundred twenty-eight million, four hundred forty thousand, one hundred seventy-eight".