16401432 has 32 divisors (see below), whose sum is σ = 41223600. Its totient is φ = 5437824.

The previous prime is 16401419. The next prime is 16401457. The reversal of 16401432 is 23410461.

It is a junction number, because it is equal to n+sod(n) for n = 16401399 and 16401408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2994 + ... + 6462.

Almost surely, 2^16401432 is an apocalyptic number.

16401432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16401432 is an abundant number, since it is smaller than the sum of its proper divisors (24822168).

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

16401432 is a wasteful number, since it uses less digits than its factorization.

16401432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3675 (or 3671 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 16401432 is about 4049.8681460018. The cubic root of 16401432 is about 254.0742131296.

Adding to 16401432 its reverse (23410461), we get a palindrome (39811893).

The spelling of 16401432 in words is "sixteen million, four hundred one thousand, four hundred thirty-two".