28572977 has 2 divisors, whose sum is σ = 28572978. Its totient is φ = 28572976.

The previous prime is 28572967. The next prime is 28572983. The reversal of 28572977 is 77927582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28558336 + 14641 = 5344^2 + 121^2 .

It is a cyclic number.

It is not a de Polignac number, because 28572977 - 2⁸ = 28572721 is a prime.

It is not a weakly prime, because it can be changed into another prime (28572967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14286488 + 14286489.

It is an arithmetic number, because the mean of its divisors is an integer number (14286489).

Almost surely, 2^28572977 is an apocalyptic number.

It is an amenable number.

28572977 is a deficient number, since it is larger than the sum of its proper divisors (1).

28572977 is an equidigital number, since it uses as much as digits as its factorization.

28572977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 493920, while the sum is 47.

The square root of 28572977 is about 5345.3696785162. The cubic root of 28572977 is about 305.7162312971.

The spelling of 28572977 in words is "twenty-eight million, five hundred seventy-two thousand, nine hundred seventy-seven".