28007387 has 16 divisors (see below), whose sum is σ = 30525600. Its totient is φ = 25608960.

The previous prime is 28007383. The next prime is 28007393. The reversal of 28007387 is 78370082.

It is a happy number.

It is not a de Polignac number, because 28007387 - 2² = 28007383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28007383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122189 + ... + 122417.

It is an arithmetic number, because the mean of its divisors is an integer number (1907850).

Almost surely, 2^28007387 is an apocalyptic number.

28007387 is a deficient number, since it is larger than the sum of its proper divisors (2518213).

28007387 is a wasteful number, since it uses less digits than its factorization.

28007387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 28007387 is about 5292.2005819886. The cubic root of 28007387 is about 303.6855987476.

The spelling of 28007387 in words is "twenty-eight million, seven thousand, three hundred eighty-seven".