16432320 has 56 divisors (see below), whose sum is σ = 52175664. Its totient is φ = 4381696.

The previous prime is 16432313. The next prime is 16432331. The reversal of 16432320 is 2323461.

It is a happy number.

It is a super-2 number, since 2×16432320² = 540042281164800, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7599 + ... + 9518.

Almost surely, 2^16432320 is an apocalyptic number.

16432320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16432320 is an abundant number, since it is smaller than the sum of its proper divisors (35743344).

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

16432320 is a wasteful number, since it uses less digits than its factorization.

16432320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17137 (or 17127 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 16432320 is about 4053.6798097531. The cubic root of 16432320 is about 254.2336082149.

Adding to 16432320 its reverse (2323461), we get a palindrome (18755781).

The spelling of 16432320 in words is "sixteen million, four hundred thirty-two thousand, three hundred twenty".