28303942438 has 4 divisors (see below), whose sum is σ = 42455913660. Its totient is φ = 14151971218.

The previous prime is 28303942409. The next prime is 28303942463. The reversal of 28303942438 is 83424930382.

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

It is a super-2 number, since 2×28303942438² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7075985608 + ... + 7075985611.

It is an arithmetic number, because the mean of its divisors is an integer number (10613978415).

Almost surely, 2^28303942438 is an apocalyptic number.

28303942438 is a deficient number, since it is larger than the sum of its proper divisors (14151971222).

28303942438 is a wasteful number, since it uses less digits than its factorization.

28303942438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14151971221.

The product of its (nonzero) digits is 995328, while the sum is 46.

The spelling of 28303942438 in words is "twenty-eight billion, three hundred three million, nine hundred forty-two thousand, four hundred thirty-eight".