8402447 has 4 divisors (see below), whose sum is σ = 8468736. Its totient is φ = 8336160.

The previous prime is 8402419. The next prime is 8402453. The reversal of 8402447 is 7442048.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8402447 - 2²² = 4208143 is a prime.

It is a super-2 number, since 2×8402447² = 141202231175618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8402477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32954 + ... + 33207.

It is an arithmetic number, because the mean of its divisors is an integer number (2117184).

Almost surely, 2^8402447 is an apocalyptic number.

8402447 is a deficient number, since it is larger than the sum of its proper divisors (66289).

8402447 is a wasteful number, since it uses less digits than its factorization.

8402447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66288.

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 8402447 is about 2898.6974661044. The cubic root of 8402447 is about 203.2990085091.

The spelling of 8402447 in words is "eight million, four hundred two thousand, four hundred forty-seven".