28313019 has 24 divisors (see below), whose sum is σ = 48353760. Its totient is φ = 15619968.

The previous prime is 28313017. The next prime is 28313063. The reversal of 28313019 is 91031382.

It is not a de Polignac number, because 28313019 - 2¹ = 28313017 is a prime.

It is a super-2 number, since 2×28313019² = 1603254089788722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28312983 and 28313001.

It is not an unprimeable number, because it can be changed into a prime (28313017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5922 + ... + 9575.

It is an arithmetic number, because the mean of its divisors is an integer number (2014740).

Almost surely, 2^28313019 is an apocalyptic number.

28313019 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28313019 is a deficient number, since it is larger than the sum of its proper divisors (20040741).

28313019 is a wasteful number, since it uses less digits than its factorization.

28313019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15539 (or 15536 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 28313019 is about 5320.9979327190. The cubic root of 28313019 is about 304.7862660954.

The spelling of 28313019 in words is "twenty-eight million, three hundred thirteen thousand, nineteen".