28400119 has 4 divisors (see below), whose sum is σ = 30981960. Its totient is φ = 25818280.

The previous prime is 28400107. The next prime is 28400129. The reversal of 28400119 is 91100482.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28400119 - 2⁷ = 28399991 is a prime.

It is a super-2 number, since 2×28400119² = 1613133518428322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28400093 and 28400102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28400129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1290904 + ... + 1290925.

It is an arithmetic number, because the mean of its divisors is an integer number (7745490).

Almost surely, 2^28400119 is an apocalyptic number.

28400119 is a deficient number, since it is larger than the sum of its proper divisors (2581841).

28400119 is a wasteful number, since it uses less digits than its factorization.

28400119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581840.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 28400119 is about 5329.1762027540. The cubic root of 28400119 is about 305.0984865141.

The spelling of 28400119 in words is "twenty-eight million, four hundred thousand, one hundred nineteen".