28503938 has 8 divisors (see below), whose sum is σ = 43798860. Its totient is φ = 13904320.

The previous prime is 28503913. The next prime is 28503961. The reversal of 28503938 is 83930582.

It can be written as a sum of positive squares in 2 ways, for example, as 26450449 + 2053489 = 5143^2 + 1433^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173723 + ... + 173886.

Almost surely, 2^28503938 is an apocalyptic number.

28503938 is a deficient number, since it is larger than the sum of its proper divisors (15294922).

28503938 is a wasteful number, since it uses less digits than its factorization.

28503938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347652.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 28503938 is about 5338.9079407684. The cubic root of 28503938 is about 305.4698053934.

The spelling of 28503938 in words is "twenty-eight million, five hundred three thousand, nine hundred thirty-eight".