402428450 has 18 divisors (see below), whose sum is σ = 748780851. Its totient is φ = 160914640.

The previous prime is 402428431. The next prime is 402428461. The reversal of 402428450 is 54824204.

It can be written as a sum of positive squares in 5 ways, for example, as 786769 + 401641681 = 887^2 + 20041^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=14185.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 140432 + ... + 143268.

Almost surely, 2^402428450 is an apocalyptic number.

402428450 is a deficient number, since it is larger than the sum of its proper divisors (346352401).

402428450 is an frugal number, since it uses more digits than its factorization.

402428450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5686 (or 2844 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 29.

The square root of 402428450 is about 20060.6193822624. The cubic root of 402428450 is about 738.2943734003.

The spelling of 402428450 in words is "four hundred two million, four hundred twenty-eight thousand, four hundred fifty".