28418387 has 2 divisors, whose sum is σ = 28418388. Its totient is φ = 28418386.

The previous prime is 28418359. The next prime is 28418419. The reversal of 28418387 is 78381482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28418387 - 2¹⁶ = 28352851 is a prime.

It is not a weakly prime, because it can be changed into another prime (28418587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14209193 + 14209194.

It is an arithmetic number, because the mean of its divisors is an integer number (14209194).

Almost surely, 2^28418387 is an apocalyptic number.

28418387 is a deficient number, since it is larger than the sum of its proper divisors (1).

28418387 is an equidigital number, since it uses as much as digits as its factorization.

28418387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 41.

The square root of 28418387 is about 5330.8898881894. The cubic root of 28418387 is about 305.1638893450.

The spelling of 28418387 in words is "twenty-eight million, four hundred eighteen thousand, three hundred eighty-seven".