28738406 has 8 divisors (see below), whose sum is σ = 43157664. Its totient is φ = 14352520.

The previous prime is 28738403. The next prime is 28738429. The reversal of 28738406 is 60483782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28738406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28738403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6065 + ... + 9708.

It is an arithmetic number, because the mean of its divisors is an integer number (5394708).

Almost surely, 2^28738406 is an apocalyptic number.

28738406 is a deficient number, since it is larger than the sum of its proper divisors (14419258).

28738406 is a wasteful number, since it uses less digits than its factorization.

28738406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16686.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 28738406 is about 5360.8213922868. The cubic root of 28738406 is about 306.3050981804.

The spelling of 28738406 in words is "twenty-eight million, seven hundred thirty-eight thousand, four hundred six".