405642633 has 16 divisors (see below), whose sum is σ = 610372800. Its totient is φ = 237366080.

The previous prime is 405642631. The next prime is 405642649. The reversal of 405642633 is 336246504.

It is a cyclic number.

It is not a de Polignac number, because 405642633 - 2¹ = 405642631 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 405642594 and 405642603.

It is not an unprimeable number, because it can be changed into a prime (405642631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210978 + ... + 212891.

It is an arithmetic number, because the mean of its divisors is an integer number (38148300).

Almost surely, 2^405642633 is an apocalyptic number.

It is an amenable number.

405642633 is a deficient number, since it is larger than the sum of its proper divisors (204730167).

405642633 is a wasteful number, since it uses less digits than its factorization.

405642633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423912.

The product of its (nonzero) digits is 51840, while the sum is 33.

The square root of 405642633 is about 20140.5718141268. The cubic root of 405642633 is about 740.2547412471.

The spelling of 405642633 in words is "four hundred five million, six hundred forty-two thousand, six hundred thirty-three".