28938234 has 32 divisors (see below), whose sum is σ = 62564544. Its totient is φ = 8870400.

The previous prime is 28938211. The next prime is 28938241. The reversal of 28938234 is 43283982.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 28938192 and 28938201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27009 + ... + 28059.

It is an arithmetic number, because the mean of its divisors is an integer number (1955142).

Almost surely, 2^28938234 is an apocalyptic number.

28938234 is an abundant number, since it is smaller than the sum of its proper divisors (33626310).

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

28938234 is a wasteful number, since it uses less digits than its factorization.

28938234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422.

The product of its digits is 82944, while the sum is 39.

The square root of 28938234 is about 5379.4269211506. The cubic root of 28938234 is about 307.0134071606.

The spelling of 28938234 in words is "twenty-eight million, nine hundred thirty-eight thousand, two hundred thirty-four".