428620490 has 16 divisors (see below), whose sum is σ = 816900552. Its totient is φ = 161362944.

The previous prime is 428620481. The next prime is 428620499. The reversal of 428620490 is 94026824.

It is an interprime number because it is at equal distance from previous prime (428620481) and next prime (428620499).

It can be written as a sum of positive squares in 4 ways, for example, as 426050881 + 2569609 = 20641^2 + 1603^2 .

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 428620490.

It is not an unprimeable number, because it can be changed into a prime (428620499) 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, 1260479 + ... + 1260818.

Almost surely, 2^428620490 is an apocalyptic number.

428620490 is a deficient number, since it is larger than the sum of its proper divisors (388280062).

428620490 is a wasteful number, since it uses less digits than its factorization.

428620490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521321.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 428620490 is about 20703.1516924356. The cubic root of 428620490 is about 753.9762098280.

The spelling of 428620490 in words is "four hundred twenty-eight million, six hundred twenty thousand, four hundred ninety".