16642040 has 32 divisors (see below), whose sum is σ = 38655360. Its totient is φ = 6441600.

The previous prime is 16642039. The next prime is 16642069. The reversal of 16642040 is 4024661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 16641997 and 16642015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5471 + ... + 7950.

It is an arithmetic number, because the mean of its divisors is an integer number (1207980).

Almost surely, 2^16642040 is an apocalyptic number.

16642040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16642040 is an abundant number, since it is smaller than the sum of its proper divisors (22013320).

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

16642040 is a wasteful number, since it uses less digits than its factorization.

16642040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13463 (or 13459 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 16642040 is about 4079.4656512833. The cubic root of 16642040 is about 255.3106044678.

The spelling of 16642040 in words is "sixteen million, six hundred forty-two thousand, forty".