16333640 has 16 divisors (see below), whose sum is σ = 36750780. Its totient is φ = 6533440.

The previous prime is 16333633. The next prime is 16333649. The reversal of 16333640 is 4633361.

It can be written as a sum of positive squares in 2 ways, for example, as 14945956 + 1387684 = 3866^2 + 1178^2 .

It is not an unprimeable number, because it can be changed into a prime (16333649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204131 + ... + 204210.

Almost surely, 2^16333640 is an apocalyptic number.

16333640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16333640 is an abundant number, since it is smaller than the sum of its proper divisors (20417140).

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

16333640 is a wasteful number, since it uses less digits than its factorization.

16333640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408352 (or 408348 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 16333640 is about 4041.4898243098. The cubic root of 16333640 is about 253.7236749446.

The spelling of 16333640 in words is "sixteen million, three hundred thirty-three thousand, six hundred forty".