16749390 has 64 divisors (see below), whose sum is σ = 46946304. Its totient is φ = 3744768.

The previous prime is 16749389. The next prime is 16749401. The reversal of 16749390 is 9394761.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9022 + ... + 10718.

It is an arithmetic number, because the mean of its divisors is an integer number (733536).

Almost surely, 2^16749390 is an apocalyptic number.

16749390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16749390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23473152).

16749390 is an abundant number, since it is smaller than the sum of its proper divisors (30196914).

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

16749390 is a wasteful number, since it uses less digits than its factorization.

16749390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 16749390 is about 4092.6018618967. The cubic root of 16749390 is about 255.8583913275.

The spelling of 16749390 in words is "sixteen million, seven hundred forty-nine thousand, three hundred ninety".