28077541 has 4 divisors (see below), whose sum is σ = 28298752. Its totient is φ = 27856332.

The previous prime is 28077529. The next prime is 28077547. The reversal of 28077541 is 14577082.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28077541 - 2⁵ = 28077509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28077497 and 28077506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28077547) 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, 110415 + ... + 110668.

It is an arithmetic number, because the mean of its divisors is an integer number (7074688).

Almost surely, 2^28077541 is an apocalyptic number.

It is an amenable number.

28077541 is a deficient number, since it is larger than the sum of its proper divisors (221211).

28077541 is a wasteful number, since it uses less digits than its factorization.

28077541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221210.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 28077541 is about 5298.8244922813. The cubic root of 28077541 is about 303.9389485260.

The spelling of 28077541 in words is "twenty-eight million, seventy-seven thousand, five hundred forty-one".