28377455 has 4 divisors (see below), whose sum is σ = 34052952. Its totient is φ = 22701960.

The previous prime is 28377439. The next prime is 28377473. The reversal of 28377455 is 55477382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55477382 = 2 ⋅27738691.

It is not a de Polignac number, because 28377455 - 2⁴ = 28377439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2837741 + ... + 2837750.

It is an arithmetic number, because the mean of its divisors is an integer number (8513238).

Almost surely, 2^28377455 is an apocalyptic number.

28377455 is a deficient number, since it is larger than the sum of its proper divisors (5675497).

28377455 is an equidigital number, since it uses as much as digits as its factorization.

28377455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5675496.

The product of its digits is 235200, while the sum is 41.

The square root of 28377455 is about 5327.0493708994. The cubic root of 28377455 is about 305.0173061935.

The spelling of 28377455 in words is "twenty-eight million, three hundred seventy-seven thousand, four hundred fifty-five".