28762238 has 16 divisors (see below), whose sum is σ = 46524240. Its totient is φ = 13291200.

The previous prime is 28762231. The next prime is 28762277. The reversal of 28762238 is 83226782.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28762231) 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, 7673 + ... + 10788.

It is an arithmetic number, because the mean of its divisors is an integer number (2907765).

Almost surely, 2^28762238 is an apocalyptic number.

28762238 is a deficient number, since it is larger than the sum of its proper divisors (17762002).

28762238 is a wasteful number, since it uses less digits than its factorization.

28762238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18523.

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

The square root of 28762238 is about 5363.0437253485. The cubic root of 28762238 is about 306.3897450251.

It can be divided in two parts, 287622 and 38, that multiplied together give a square (10929636 = 3306²).

The spelling of 28762238 in words is "twenty-eight million, seven hundred sixty-two thousand, two hundred thirty-eight".