16780090 has 8 divisors (see below), whose sum is σ = 30204180. Its totient is φ = 6712032.

The previous prime is 16780079. The next prime is 16780091. The reversal of 16780090 is 9008761.

It can be written as a sum of positive squares in 2 ways, for example, as 16491721 + 288369 = 4061^2 + 537^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (16780091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 838995 + ... + 839014.

Almost surely, 2^16780090 is an apocalyptic number.

16780090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16780090 is a deficient number, since it is larger than the sum of its proper divisors (13424090).

16780090 is a wasteful number, since it uses less digits than its factorization.

16780090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678016.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 16780090 is about 4096.3508150548. The cubic root of 16780090 is about 256.0146170853.

The spelling of 16780090 in words is "sixteen million, seven hundred eighty thousand, ninety".