28477487 has 2 divisors, whose sum is σ = 28477488. Its totient is φ = 28477486.

The previous prime is 28477459. The next prime is 28477489. The reversal of 28477487 is 78477482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28477487 - 2¹² = 28473391 is a prime.

Together with 28477489, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28477489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14238743 + 14238744.

It is an arithmetic number, because the mean of its divisors is an integer number (14238744).

Almost surely, 2^28477487 is an apocalyptic number.

28477487 is a deficient number, since it is larger than the sum of its proper divisors (1).

28477487 is an equidigital number, since it uses as much as digits as its factorization.

28477487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 702464, while the sum is 47.

The square root of 28477487 is about 5336.4301738147. The cubic root of 28477487 is about 305.3752864950.

The spelling of 28477487 in words is "twenty-eight million, four hundred seventy-seven thousand, four hundred eighty-seven".