28430136 has 64 divisors (see below), whose sum is σ = 90259200. Its totient is φ = 8122464.

The previous prime is 28430123. The next prime is 28430141. The reversal of 28430136 is 63103482.

It is a happy number.

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.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7890 + ... + 10913.

It is an arithmetic number, because the mean of its divisors is an integer number (1410300).

Almost surely, 2^28430136 is an apocalyptic number.

It is an amenable number.

28430136 is an abundant number, since it is smaller than the sum of its proper divisors (61829064).

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

28430136 is a wasteful number, since it uses less digits than its factorization.

28430136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18825 (or 18815 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 28430136 is about 5331.9917479306. The cubic root of 28430136 is about 305.2059381372.

The spelling of 28430136 in words is "twenty-eight million, four hundred thirty thousand, one hundred thirty-six".