428809402 has 16 divisors (see below), whose sum is σ = 737903232. Its totient is φ = 183075120.

The previous prime is 428809397. The next prime is 428809417. The reversal of 428809402 is 204908824.

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, 54549 + ... + 61912.

It is an arithmetic number, because the mean of its divisors is an integer number (46118952).

Almost surely, 2^428809402 is an apocalyptic number.

428809402 is a deficient number, since it is larger than the sum of its proper divisors (309093830).

428809402 is a wasteful number, since it uses less digits than its factorization.

428809402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116733.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 428809402 is about 20707.7135869704. The cubic root of 428809402 is about 754.0869637750.

The spelling of 428809402 in words is "four hundred twenty-eight million, eight hundred nine thousand, four hundred two".