28146977 has 4 divisors (see below), whose sum is σ = 29054976. Its totient is φ = 27238980.

The previous prime is 28146967. The next prime is 28146991. The reversal of 28146977 is 77964182.

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 28146977 - 2⁸ = 28146721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28146947) 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, 453953 + ... + 454014.

It is an arithmetic number, because the mean of its divisors is an integer number (7263744).

Almost surely, 2^28146977 is an apocalyptic number.

It is an amenable number.

28146977 is a deficient number, since it is larger than the sum of its proper divisors (907999).

28146977 is an equidigital number, since it uses as much as digits as its factorization.

28146977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907998.

The product of its digits is 169344, while the sum is 44.

The square root of 28146977 is about 5305.3724657181. The cubic root of 28146977 is about 304.1892901502.

The spelling of 28146977 in words is "twenty-eight million, one hundred forty-six thousand, nine hundred seventy-seven".