16491402 has 12 divisors (see below), whose sum is σ = 35731410. Its totient is φ = 5497128.

The previous prime is 16491379. The next prime is 16491443. The reversal of 16491402 is 20419461.

16491402 is a `hidden beast` number, since 1 + 649 + 14 + 0 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10246401 + 6245001 = 3201^2 + 2499^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 458077 + ... + 458112.

Almost surely, 2^16491402 is an apocalyptic number.

16491402 is an abundant number, since it is smaller than the sum of its proper divisors (19240008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16491402 is a wasteful number, since it uses less digits than its factorization.

16491402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916197 (or 916194 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 16491402 is about 4060.9607237697. The cubic root of 16491402 is about 254.5379406486.

The spelling of 16491402 in words is "sixteen million, four hundred ninety-one thousand, four hundred two".