28077001 has 4 divisors (see below), whose sum is σ = 28674432. Its totient is φ = 27479572.

The previous prime is 28076989. The next prime is 28077037. The reversal of 28077001 is 10077082.

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 28077001 - 2¹¹ = 28074953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28077601) 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, 298645 + ... + 298738.

It is an arithmetic number, because the mean of its divisors is an integer number (7168608).

Almost surely, 2^28077001 is an apocalyptic number.

It is an amenable number.

28077001 is a deficient number, since it is larger than the sum of its proper divisors (597431).

28077001 is an equidigital number, since it uses as much as digits as its factorization.

28077001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597430.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 28077001 is about 5298.7735373386. The cubic root of 28077001 is about 303.9370000163.

The spelling of 28077001 in words is "twenty-eight million, seventy-seven thousand, one".