16371640 has 16 divisors (see below), whose sum is σ = 36836280. Its totient is φ = 6548640.

The previous prime is 16371617. The next prime is 16371643. The reversal of 16371640 is 4617361.

It is a junction number, because it is equal to n+sod(n) for n = 16371599 and 16371608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16371643) 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, 204606 + ... + 204685.

Almost surely, 2^16371640 is an apocalyptic number.

16371640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16371640 is an abundant number, since it is smaller than the sum of its proper divisors (20464640).

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

16371640 is a wasteful number, since it uses less digits than its factorization.

16371640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409302 (or 409298 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 16371640 is about 4046.1883297741. The cubic root of 16371640 is about 253.9202841584.

The spelling of 16371640 in words is "sixteen million, three hundred seventy-one thousand, six hundred forty".