981408405 has 16 divisors (see below), whose sum is σ = 1581718464. Its totient is φ = 519596160.

The previous prime is 981408403. The next prime is 981408409. The reversal of 981408405 is 504804189.

It is not a de Polignac number, because 981408405 - 2¹ = 981408403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981408403) 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, 236731 + ... + 240840.

It is an arithmetic number, because the mean of its divisors is an integer number (98857404).

Almost surely, 2^981408405 is an apocalyptic number.

It is an amenable number.

981408405 is a deficient number, since it is larger than the sum of its proper divisors (600310059).

981408405 is a wasteful number, since it uses less digits than its factorization.

981408405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477716.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 981408405 is about 31327.4385323792. The cubic root of 981408405 is about 993.7639947398.

The spelling of 981408405 in words is "nine hundred eighty-one million, four hundred eight thousand, four hundred five".