16780040 has 32 divisors (see below), whose sum is σ = 39744000. Its totient is φ = 6358464.

The previous prime is 16780031. The next prime is 16780051. The reversal of 16780040 is 4008761.

It is a junction number, because it is equal to n+sod(n) for n = 16779991 and 16780009.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10280 + ... + 11799.

It is an arithmetic number, because the mean of its divisors is an integer number (1242000).

Almost surely, 2^16780040 is an apocalyptic number.

16780040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16780040 is an abundant number, since it is smaller than the sum of its proper divisors (22963960).

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

16780040 is a wasteful number, since it uses less digits than its factorization.

16780040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22109 (or 22105 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 16780040 is about 4096.3447120573. The cubic root of 16780040 is about 256.0143628009.

The spelling of 16780040 in words is "sixteen million, seven hundred eighty thousand, forty".