405622538 has 8 divisors (see below), whose sum is σ = 628060800. Its totient is φ = 196268940.

The previous prime is 405622537. The next prime is 405622543. The reversal of 405622538 is 835226504.

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

It is a super-2 number, since 2×405622538² = 329059286667122888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 405622498 and 405622507.

It is not an unprimeable number, because it can be changed into a prime (405622537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3271088 + ... + 3271211.

It is an arithmetic number, because the mean of its divisors is an integer number (78507600).

Almost surely, 2^405622538 is an apocalyptic number.

405622538 is a deficient number, since it is larger than the sum of its proper divisors (222438262).

405622538 is a wasteful number, since it uses less digits than its factorization.

405622538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6542332.

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 405622538 is about 20140.0729392920. The cubic root of 405622538 is about 740.2425172980.

The spelling of 405622538 in words is "four hundred five million, six hundred twenty-two thousand, five hundred thirty-eight".