8400813 has 8 divisors (see below), whose sum is σ = 11503968. Its totient is φ = 5449104.

The previous prime is 8400811. The next prime is 8400823. The reversal of 8400813 is 3180048.

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

It is not a de Polignac number, because 8400813 - 2¹ = 8400811 is a prime.

8400813 is a modest number, since divided by 813 gives 84 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8400811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37731 + ... + 37952.

It is an arithmetic number, because the mean of its divisors is an integer number (1437996).

Almost surely, 2^8400813 is an apocalyptic number.

It is an amenable number.

8400813 is a deficient number, since it is larger than the sum of its proper divisors (3103155).

8400813 is a wasteful number, since it uses less digits than its factorization.

8400813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75723.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 8400813 is about 2898.4156016693. The cubic root of 8400813 is about 203.2858293279.

The spelling of 8400813 in words is "eight million, four hundred thousand, eight hundred thirteen".