428209092 has 30 divisors (see below), whose sum is σ = 1119423998. Its totient is φ = 142736256.

The previous prime is 428209091. The next prime is 428209109. The reversal of 428209092 is 290902824.

It can be written as a sum of positive squares in only one way, i.e., 246929796 + 181279296 = 15714^2 + 13464^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (428209091) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 660493 + ... + 661140.

Almost surely, 2^428209092 is an apocalyptic number.

It is an amenable number.

428209092 is an abundant number, since it is smaller than the sum of its proper divisors (691214906).

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

428209092 is a wasteful number, since it uses less digits than its factorization.

428209092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321649 (or 1321638 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 428209092 is about 20693.2136701867. The cubic root of 428209092 is about 753.7349057644.

The spelling of 428209092 in words is "four hundred twenty-eight million, two hundred nine thousand, ninety-two".