408287481 has 16 divisors (see below), whose sum is σ = 631440384. Its totient is φ = 229824144.

The previous prime is 408287479. The next prime is 408287527. The reversal of 408287481 is 184782804.

It is not a de Polignac number, because 408287481 - 2¹ = 408287479 is a prime.

It is a super-2 number, since 2×408287481² = 333397334282650722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (408287401) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 143685 + ... + 146498.

It is an arithmetic number, because the mean of its divisors is an integer number (39465024).

Almost surely, 2^408287481 is an apocalyptic number.

It is an amenable number.

408287481 is a deficient number, since it is larger than the sum of its proper divisors (223152903).

408287481 is a wasteful number, since it uses less digits than its factorization.

408287481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290260.

The product of its (nonzero) digits is 114688, while the sum is 42.

The square root of 408287481 is about 20206.1248387710. The cubic root of 408287481 is about 741.8601128076.

The spelling of 408287481 in words is "four hundred eight million, two hundred eighty-seven thousand, four hundred eighty-one".