16501040 has 20 divisors (see below), whose sum is σ = 38365104. Its totient is φ = 6600384.

The previous prime is 16501031. The next prime is 16501081. The reversal of 16501040 is 4010561.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103052 + ... + 103211.

Almost surely, 2^16501040 is an apocalyptic number.

16501040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16501040 is an abundant number, since it is smaller than the sum of its proper divisors (21864064).

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

16501040 is a wasteful number, since it uses less digits than its factorization.

16501040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206276 (or 206270 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 16501040 is about 4062.1472154515. The cubic root of 16501040 is about 254.5875171677.

The spelling of 16501040 in words is "sixteen million, five hundred one thousand, forty".