28152919 has 2 divisors, whose sum is σ = 28152920. Its totient is φ = 28152918.

The previous prime is 28152863. The next prime is 28152923. The reversal of 28152919 is 91925182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28152919 - 2¹⁹ = 27628631 is a prime.

It is a super-2 number, since 2×28152919² = 1585173696441122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28152959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14076459 + 14076460.

It is an arithmetic number, because the mean of its divisors is an integer number (14076460).

Almost surely, 2^28152919 is an apocalyptic number.

28152919 is a deficient number, since it is larger than the sum of its proper divisors (1).

28152919 is an equidigital number, since it uses as much as digits as its factorization.

28152919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 37.

The square root of 28152919 is about 5305.9324345491. The cubic root of 28152919 is about 304.2106940543.

The spelling of 28152919 in words is "twenty-eight million, one hundred fifty-two thousand, nine hundred nineteen".