428436 has 24 divisors (see below), whose sum is σ = 1111040. Its totient is φ = 142776.

The previous prime is 428429. The next prime is 428471. The reversal of 428436 is 634824.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

428436 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1876 + ... + 2091.

2⁴²⁸⁴³⁶ is an apocalyptic number.

It is an amenable number.

428436 is an abundant number, since it is smaller than the sum of its proper divisors (682604).

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

428436 is a wasteful number, since it uses less digits than its factorization.

428436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3980 (or 3972 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 428436 is about 654.5502272553. The cubic root of 428436 is about 75.3868016965.

It can be divided in two parts, 42843 and 6, that added together give a square (42849 = 207²).

The spelling of 428436 in words is "four hundred twenty-eight thousand, four hundred thirty-six".