28472377 has 2 divisors, whose sum is σ = 28472378. Its totient is φ = 28472376.

The previous prime is 28472371. The next prime is 28472401. The reversal of 28472377 is 77327482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28259856 + 212521 = 5316^2 + 461^2 .

It is a cyclic number.

It is not a de Polignac number, because 28472377 - 2³ = 28472369 is a prime.

It is not a weakly prime, because it can be changed into another prime (28472371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14236188 + 14236189.

It is an arithmetic number, because the mean of its divisors is an integer number (14236189).

Almost surely, 2^28472377 is an apocalyptic number.

It is an amenable number.

28472377 is a deficient number, since it is larger than the sum of its proper divisors (1).

28472377 is an equidigital number, since it uses as much as digits as its factorization.

28472377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131712, while the sum is 40.

The square root of 28472377 is about 5335.9513678444. The cubic root of 28472377 is about 305.3570198895.

The spelling of 28472377 in words is "twenty-eight million, four hundred seventy-two thousand, three hundred seventy-seven".