84280428 has 36 divisors (see below), whose sum is σ = 224256760. Its totient is φ = 26614656.

The previous prime is 84280423. The next prime is 84280429. The reversal of 84280428 is 82408248.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 84280392 and 84280401.

It is not an unprimeable number, because it can be changed into a prime (84280421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60925 + ... + 62292.

Almost surely, 2^84280428 is an apocalyptic number.

It is an amenable number.

84280428 is an abundant number, since it is smaller than the sum of its proper divisors (139976332).

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

84280428 is a wasteful number, since it uses less digits than its factorization.

84280428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123246 (or 123241 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 36.

The square root of 84280428 is about 9180.4372444890. The cubic root of 84280428 is about 438.4387297177.

The spelling of 84280428 in words is "eighty-four million, two hundred eighty thousand, four hundred twenty-eight".