236421028 has 12 divisors (see below), whose sum is σ = 435512560. Its totient is φ = 111988872.

The previous prime is 236421019. The next prime is 236421049. The reversal of 236421028 is 820124632.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 236420987 and 236421005.

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 3 ways as a sum of consecutive naturals, for example, 1555326 + ... + 1555477.

Almost surely, 2^236421028 is an apocalyptic number.

It is an amenable number.

236421028 is a deficient number, since it is larger than the sum of its proper divisors (199091532).

236421028 is a wasteful number, since it uses less digits than its factorization.

236421028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3110826 (or 3110824 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 236421028 is about 15375.9886836587. The cubic root of 236421028 is about 618.3419346882.

The spelling of 236421028 in words is "two hundred thirty-six million, four hundred twenty-one thousand, twenty-eight".