28736424 has 32 divisors (see below), whose sum is σ = 79824000. Its totient is φ = 9578736.

The previous prime is 28736423. The next prime is 28736431. The reversal of 28736424 is 42463782.

28736424 is a `hidden beast` number, since 2 + 8 + 7 + 3 + 642 + 4 = 666.

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 (28736423) 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, 66304 + ... + 66735.

It is an arithmetic number, because the mean of its divisors is an integer number (2494500).

Almost surely, 2^28736424 is an apocalyptic number.

28736424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28736424 is an abundant number, since it is smaller than the sum of its proper divisors (51087576).

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

28736424 is a wasteful number, since it uses less digits than its factorization.

28736424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133054 (or 133044 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 28736424 is about 5360.6365293685. The cubic root of 28736424 is about 306.2980563765.

The spelling of 28736424 in words is "twenty-eight million, seven hundred thirty-six thousand, four hundred twenty-four".