405698042 has 16 divisors (see below), whose sum is σ = 622987200. Its totient is φ = 198081600.

The previous prime is 405698017. The next prime is 405698141. The reversal of 405698042 is 240896504.

It is a junction number, because it is equal to n+sod(n) for n = 405697987 and 405698005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6434 + ... + 29202.

It is an arithmetic number, because the mean of its divisors is an integer number (38936700).

Almost surely, 2^405698042 is an apocalyptic number.

405698042 is a deficient number, since it is larger than the sum of its proper divisors (217289158).

405698042 is a wasteful number, since it uses less digits than its factorization.

405698042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22981.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 405698042 is about 20141.9473239307. The cubic root of 405698042 is about 740.2884448935.

The spelling of 405698042 in words is "four hundred five million, six hundred ninety-eight thousand, forty-two".