428890138 has 8 divisors (see below), whose sum is σ = 643426560. Its totient is φ = 214414620.

The previous prime is 428890123. The next prime is 428890141. The reversal of 428890138 is 831098824.

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

It is a junction number, because it is equal to n+sod(n) for n = 428890094 and 428890103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12423 + ... + 31813.

It is an arithmetic number, because the mean of its divisors is an integer number (80428320).

Almost surely, 2^428890138 is an apocalyptic number.

428890138 is a deficient number, since it is larger than the sum of its proper divisors (214536422).

428890138 is a wasteful number, since it uses less digits than its factorization.

428890138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30452.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 428890138 is about 20709.6629137222. The cubic root of 428890138 is about 754.1342871657.

The spelling of 428890138 in words is "four hundred twenty-eight million, eight hundred ninety thousand, one hundred thirty-eight".