428009156628 has 96 divisors (see below), whose sum is σ = 1061663490048. Its totient is φ = 133968297600.

The previous prime is 428009156609. The next prime is 428009156629. The reversal of 428009156628 is 826651900824.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428009156629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5009023 + ... + 5093753.

It is an arithmetic number, because the mean of its divisors is an integer number (11058994688).

Almost surely, 2^428009156628 is an apocalyptic number.

It is an amenable number.

428009156628 is an abundant number, since it is smaller than the sum of its proper divisors (633654333420).

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

428009156628 is a wasteful number, since it uses less digits than its factorization.

428009156628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85173 (or 85171 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 428009156628 in words is "four hundred twenty-eight billion, nine million, one hundred fifty-six thousand, six hundred twenty-eight".