16157720 has 32 divisors (see below), whose sum is σ = 36903600. Its totient is φ = 6365568.

The previous prime is 16157719. The next prime is 16157761. The reversal of 16157720 is 2775161.

It is a super-2 number, since 2×16157720² = 522143831196800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335 + ... + 5694.

Almost surely, 2^16157720 is an apocalyptic number.

16157720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16157720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18451800).

16157720 is an abundant number, since it is smaller than the sum of its proper divisors (20745880).

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

16157720 is a wasteful number, since it uses less digits than its factorization.

16157720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6107 (or 6103 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 16157720 is about 4019.6666528457. Note that the first 4 decimals coincide. The cubic root of 16157720 is about 252.8094822993.

The spelling of 16157720 in words is "sixteen million, one hundred fifty-seven thousand, seven hundred twenty".