400622393 has 8 divisors (see below), whose sum is σ = 414253056. Its totient is φ = 387036000.

The previous prime is 400622317. The next prime is 400622401. The reversal of 400622393 is 393226004.

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

It is a cyclic number.

It is not a de Polignac number, because 400622393 - 2¹⁰ = 400621369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400622293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7880 + ... + 29382.

It is an arithmetic number, because the mean of its divisors is an integer number (51781632).

Almost surely, 2^400622393 is an apocalyptic number.

It is an amenable number.

400622393 is a deficient number, since it is larger than the sum of its proper divisors (13630663).

400622393 is a wasteful number, since it uses less digits than its factorization.

400622393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22135.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 400622393 is about 20015.5537770005. The cubic root of 400622393 is about 737.1882542611.

Adding to 400622393 its reverse (393226004), we get a palindrome (793848397).

The spelling of 400622393 in words is "four hundred million, six hundred twenty-two thousand, three hundred ninety-three".