16538740 has 48 divisors (see below), whose sum is σ = 37134720. Its totient is φ = 6168960.

The previous prime is 16538737. The next prime is 16538801. The reversal of 16538740 is 4783561.

It is a junction number, because it is equal to n+sod(n) for n = 16538696 and 16538705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26674 + ... + 27286.

It is an arithmetic number, because the mean of its divisors is an integer number (773640).

Almost surely, 2^16538740 is an apocalyptic number.

16538740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16538740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18567360).

16538740 is an abundant number, since it is smaller than the sum of its proper divisors (20595980).

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

16538740 is a wasteful number, since it uses less digits than its factorization.

16538740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 16538740 is about 4066.7849709568. The cubic root of 16538740 is about 254.7812554445.

It can be divided in two parts, 165 and 38740, that multiplied together give a triangular number (6392100 = T₃₅₇₅).

The spelling of 16538740 in words is "sixteen million, five hundred thirty-eight thousand, seven hundred forty".