16406481 has 32 divisors (see below), whose sum is σ = 28349440. Its totient is φ = 8195904.

The previous prime is 16406477. The next prime is 16406497. The reversal of 16406481 is 18460461.

16406481 = T₄₇₀ + T₄₇₁ + ... + T₅₈₆.

It is not a de Polignac number, because 16406481 - 2² = 16406477 is a prime.

It is a super-2 number, since 2×16406481² = 538345237606722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16406081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3606 + ... + 6768.

It is an arithmetic number, because the mean of its divisors is an integer number (885920).

Almost surely, 2^16406481 is an apocalyptic number.

It is an amenable number.

16406481 is a deficient number, since it is larger than the sum of its proper divisors (11942959).

16406481 is a wasteful number, since it uses less digits than its factorization.

16406481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3205.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 16406481 is about 4050.4914516636. The cubic root of 16406481 is about 254.1002817698.

The spelling of 16406481 in words is "sixteen million, four hundred six thousand, four hundred eighty-one".