28454038 has 4 divisors (see below), whose sum is σ = 42681060. Its totient is φ = 14227018.

The previous prime is 28454033. The next prime is 28454047. The reversal of 28454038 is 83045482.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 28453994 and 28454012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28454033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7113508 + ... + 7113511.

It is an arithmetic number, because the mean of its divisors is an integer number (10670265).

Almost surely, 2^28454038 is an apocalyptic number.

28454038 is a deficient number, since it is larger than the sum of its proper divisors (14227022).

28454038 is a wasteful number, since it uses less digits than its factorization.

28454038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14227021.

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 28454038 is about 5334.2326533439. The cubic root of 28454038 is about 305.2914458641.

The spelling of 28454038 in words is "twenty-eight million, four hundred fifty-four thousand, thirty-eight".