406857842 has 16 divisors (see below), whose sum is σ = 625968000. Its totient is φ = 198214560.

The previous prime is 406857817. The next prime is 406857851. The reversal of 406857842 is 248758604.

It is a junction number, because it is equal to n+sod(n) for n = 406857793 and 406857802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72659 + ... + 78057.

It is an arithmetic number, because the mean of its divisors is an integer number (39123000).

Almost surely, 2^406857842 is an apocalyptic number.

406857842 is a deficient number, since it is larger than the sum of its proper divisors (219110158).

406857842 is a wasteful number, since it uses less digits than its factorization.

406857842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6361.

The product of its (nonzero) digits is 430080, while the sum is 44.

The square root of 406857842 is about 20170.7174389014. The cubic root of 406857842 is about 740.9932134467.

The spelling of 406857842 in words is "four hundred six million, eight hundred fifty-seven thousand, eight hundred forty-two".