16539240 has 32 divisors (see below), whose sum is σ = 49618080. Its totient is φ = 4410432.

The previous prime is 16539239. The next prime is 16539269. The reversal of 16539240 is 4293561.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 16539198 and 16539207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68794 + ... + 69033.

It is an arithmetic number, because the mean of its divisors is an integer number (1550565).

Almost surely, 2^16539240 is an apocalyptic number.

16539240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16539240 is an abundant number, since it is smaller than the sum of its proper divisors (33078840).

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

16539240 is a wasteful number, since it uses less digits than its factorization.

16539240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137841 (or 137837 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 16539240 is about 4066.8464441137. The cubic root of 16539240 is about 254.7838229385.

The spelling of 16539240 in words is "sixteen million, five hundred thirty-nine thousand, two hundred forty".