16861772 has 6 divisors (see below), whose sum is σ = 29508108. Its totient is φ = 8430884.

The previous prime is 16861769. The next prime is 16861777. The reversal of 16861772 is 27716861.

It is not an unprimeable number, because it can be changed into a prime (16861777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2107718 + ... + 2107725.

It is an arithmetic number, because the mean of its divisors is an integer number (4918018).

Almost surely, 2^16861772 is an apocalyptic number.

It is an amenable number.

16861772 is a deficient number, since it is larger than the sum of its proper divisors (12646336).

16861772 is a wasteful number, since it uses less digits than its factorization.

16861772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4215447 (or 4215445 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 16861772 is about 4106.3088047540. The cubic root of 16861772 is about 256.4293535578.

The spelling of 16861772 in words is "sixteen million, eight hundred sixty-one thousand, seven hundred seventy-two".