28380023 has 8 divisors (see below), whose sum is σ = 32540448. Its totient is φ = 24246144.

The previous prime is 28380019. The next prime is 28380083. The reversal of 28380023 is 32008382.

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

It is a cyclic number.

It is not a de Polignac number, because 28380023 - 2² = 28380019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28379974 and 28380001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28380083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4286 + ... + 8667.

It is an arithmetic number, because the mean of its divisors is an integer number (4067556).

Almost surely, 2^28380023 is an apocalyptic number.

28380023 is a deficient number, since it is larger than the sum of its proper divisors (4160425).

28380023 is a wasteful number, since it uses less digits than its factorization.

28380023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13273.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 28380023 is about 5327.2903994432. The cubic root of 28380023 is about 305.0265066993.

It can be divided in two parts, 28 and 380023, that multiplied together give a square (10640644 = 3262²).

The spelling of 28380023 in words is "twenty-eight million, three hundred eighty thousand, twenty-three".