8400387 has 8 divisors (see below), whose sum is σ = 11257600. Its totient is φ = 5571720.

The previous prime is 8400377. The next prime is 8400409. The reversal of 8400387 is 7830048.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8400387 - 2⁶ = 8400323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8400317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6439 + ... + 7632.

It is an arithmetic number, because the mean of its divisors is an integer number (1407200).

Almost surely, 2^8400387 is an apocalyptic number.

8400387 is a deficient number, since it is larger than the sum of its proper divisors (2857213).

8400387 is a wasteful number, since it uses less digits than its factorization.

8400387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14273.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 8400387 is about 2898.3421123118. The cubic root of 8400387 is about 203.2823931038.

The spelling of 8400387 in words is "eight million, four hundred thousand, three hundred eighty-seven".