408136442 has 16 divisors (see below), whose sum is σ = 740819520. Its totient is φ = 164626368.

The previous prime is 408136441. The next prime is 408136457. The reversal of 408136442 is 244631804.

It is a junction number, because it is equal to n+sod(n) for n = 408136399 and 408136408.

It is not an unprimeable number, because it can be changed into a prime (408136441) 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, 857192 + ... + 857667.

It is an arithmetic number, because the mean of its divisors is an integer number (46301220).

Almost surely, 2^408136442 is an apocalyptic number.

408136442 is a deficient number, since it is larger than the sum of its proper divisors (332683078).

408136442 is a wasteful number, since it uses less digits than its factorization.

408136442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714885.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 408136442 is about 20202.3870371795. The cubic root of 408136442 is about 741.7686220202.

The spelling of 408136442 in words is "four hundred eight million, one hundred thirty-six thousand, four hundred forty-two".