428449020 has 24 divisors (see below), whose sum is σ = 1199657424. Its totient is φ = 114253056.

The previous prime is 428449019. The next prime is 428449067. The reversal of 428449020 is 20944824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3570349 + ... + 3570468.

It is an arithmetic number, because the mean of its divisors is an integer number (49985726).

Almost surely, 2^428449020 is an apocalyptic number.

It is an amenable number.

428449020 is an abundant number, since it is smaller than the sum of its proper divisors (771208404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428449020 is a wasteful number, since it uses less digits than its factorization.

428449020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7140829 (or 7140827 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 428449020 is about 20699.0101212594. The cubic root of 428449020 is about 753.8756534713.

The spelling of 428449020 in words is "four hundred twenty-eight million, four hundred forty-nine thousand, twenty".