28263742 has 16 divisors (see below), whose sum is σ = 45919440. Its totient is φ = 12969792.

The previous prime is 28263737. The next prime is 28263743. The reversal of 28263742 is 24736282.

It is a super-2 number, since 2×28263742² = 1597678223685128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28263698 and 28263707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28263743) 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, 1618 + ... + 7690.

It is an arithmetic number, because the mean of its divisors is an integer number (2869965).

Almost surely, 2^28263742 is an apocalyptic number.

28263742 is a deficient number, since it is larger than the sum of its proper divisors (17655698).

28263742 is a wasteful number, since it uses less digits than its factorization.

28263742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6267.

The product of its digits is 32256, while the sum is 34.

The square root of 28263742 is about 5316.3654878121. The cubic root of 28263742 is about 304.6093430758.

The spelling of 28263742 in words is "twenty-eight million, two hundred sixty-three thousand, seven hundred forty-two".