16452640 has 24 divisors (see below), whose sum is σ = 38869740. Its totient is φ = 6580992.

The previous prime is 16452637. The next prime is 16452643. The reversal of 16452640 is 4625461.

It is an interprime number because it is at equal distance from previous prime (16452637) and next prime (16452643).

It can be written as a sum of positive squares in 2 ways, for example, as 15460624 + 992016 = 3932^2 + 996^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16452599 and 16452608.

It is not an unprimeable number, because it can be changed into a prime (16452643) 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, 51255 + ... + 51574.

Almost surely, 2^16452640 is an apocalyptic number.

16452640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16452640 is an abundant number, since it is smaller than the sum of its proper divisors (22417100).

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

16452640 is a wasteful number, since it uses less digits than its factorization.

16452640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102844 (or 102836 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 16452640 is about 4056.1854001019. The cubic root of 16452640 is about 254.3383590751.

The spelling of 16452640 in words is "sixteen million, four hundred fifty-two thousand, six hundred forty".