156728216 has 8 divisors (see below), whose sum is σ = 293865420. Its totient is φ = 78364104.

The previous prime is 156728213. The next prime is 156728239. The reversal of 156728216 is 612827651.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 156728216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156728213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9795506 + ... + 9795521.

Almost surely, 2^156728216 is an apocalyptic number.

It is an amenable number.

156728216 is a deficient number, since it is larger than the sum of its proper divisors (137137204).

156728216 is a wasteful number, since it uses less digits than its factorization.

156728216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19591033 (or 19591029 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 156728216 is about 12519.1140261602. The cubic root of 156728216 is about 539.1575982853.

The spelling of 156728216 in words is "one hundred fifty-six million, seven hundred twenty-eight thousand, two hundred sixteen".