428447136 has 48 divisors (see below), whose sum is σ = 1211190624. Its totient is φ = 131829504.

The previous prime is 428447113. The next prime is 428447137. The reversal of 428447136 is 631744824.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 428447094 and 428447103.

It is not an unprimeable number, because it can be changed into a prime (428447137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170406 + ... + 172901.

It is an arithmetic number, because the mean of its divisors is an integer number (25233138).

Almost surely, 2^428447136 is an apocalyptic number.

It is an amenable number.

428447136 is an abundant number, since it is smaller than the sum of its proper divisors (782743488).

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

428447136 is a wasteful number, since it uses less digits than its factorization.

428447136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343333 (or 343325 counting only the distinct ones).

The product of its digits is 129024, while the sum is 39.

The square root of 428447136 is about 20698.9646117867. The cubic root of 428447136 is about 753.8745484750.

The spelling of 428447136 in words is "four hundred twenty-eight million, four hundred forty-seven thousand, one hundred thirty-six".