428122490 has 8 divisors (see below), whose sum is σ = 770620500. Its totient is φ = 171248992.

The previous prime is 428122469. The next prime is 428122511. The reversal of 428122490 is 94221824.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (428122469) and next prime (428122511).

It can be written as a sum of positive squares in 2 ways, for example, as 419307529 + 8814961 = 20477^2 + 2969^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21406115 + ... + 21406134.

Almost surely, 2^428122490 is an apocalyptic number.

428122490 is a deficient number, since it is larger than the sum of its proper divisors (342498010).

428122490 is a wasteful number, since it uses less digits than its factorization.

428122490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42812256.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 428122490 is about 20691.1210426115. The cubic root of 428122490 is about 753.6840899733.

The spelling of 428122490 in words is "four hundred twenty-eight million, one hundred twenty-two thousand, four hundred ninety".