16263640 has 16 divisors (see below), whose sum is σ = 36593280. Its totient is φ = 6505440.

The previous prime is 16263631. The next prime is 16263641. The reversal of 16263640 is 4636261.

16263640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 16263599 and 16263608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16263641) 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, 203256 + ... + 203335.

It is an arithmetic number, because the mean of its divisors is an integer number (2287080).

Almost surely, 2^16263640 is an apocalyptic number.

16263640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16263640 is an abundant number, since it is smaller than the sum of its proper divisors (20329640).

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

16263640 is a wasteful number, since it uses less digits than its factorization.

16263640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406602 (or 406598 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 16263640 is about 4032.8203530532. The cubic root of 16263640 is about 253.3607003368.

The spelling of 16263640 in words is "sixteen million, two hundred sixty-three thousand, six hundred forty".