428404990 has 32 divisors (see below), whose sum is σ = 832166496. Its totient is φ = 157852800.

The previous prime is 428404979. The next prime is 428405009. The reversal of 428404990 is 99404824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64840 + ... + 71140.

It is an arithmetic number, because the mean of its divisors is an integer number (26005203).

Almost surely, 2^428404990 is an apocalyptic number.

428404990 is a deficient number, since it is larger than the sum of its proper divisors (403761506).

428404990 is a wasteful number, since it uses less digits than its factorization.

428404990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6844.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 428404990 is about 20697.9465165025. The cubic root of 428404990 is about 753.8498283202.

The spelling of 428404990 in words is "four hundred twenty-eight million, four hundred four thousand, nine hundred ninety".