16861432 has 32 divisors (see below), whose sum is σ = 36328320. Its totient is φ = 7187040.

The previous prime is 16861387. The next prime is 16861447. The reversal of 16861432 is 23416861.

It is a happy number.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 16861394 and 16861403.

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, 11103 + ... + 12529.

It is an arithmetic number, because the mean of its divisors is an integer number (1135260).

Almost surely, 2^16861432 is an apocalyptic number.

It is an amenable number.

16861432 is an abundant number, since it is smaller than the sum of its proper divisors (19466888).

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

16861432 is a wasteful number, since it uses less digits than its factorization.

16861432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651 (or 1647 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 16861432 is about 4106.2674048337. The cubic root of 16861432 is about 256.4276300030.

The spelling of 16861432 in words is "sixteen million, eight hundred sixty-one thousand, four hundred thirty-two".