43821028 has 6 divisors (see below), whose sum is σ = 76686806. Its totient is φ = 21910512.

The previous prime is 43821023. The next prime is 43821031. The reversal of 43821028 is 82012834.

It can be written as a sum of positive squares in only one way, i.e., 43797924 + 23104 = 6618^2 + 152^2 .

It is a junction number, because it is equal to n+sod(n) for n = 43820987 and 43821005.

It is not an unprimeable number, because it can be changed into a prime (43821023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5477625 + ... + 5477632.

Almost surely, 2^43821028 is an apocalyptic number.

It is an amenable number.

43821028 is a deficient number, since it is larger than the sum of its proper divisors (32865778).

43821028 is a wasteful number, since it uses less digits than its factorization.

43821028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10955261 (or 10955259 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 43821028 is about 6619.7453123213. The cubic root of 43821028 is about 352.5555213251. Note that the first 4 decimals are identical.

The spelling of 43821028 in words is "forty-three million, eight hundred twenty-one thousand, twenty-eight".