101210728 has 16 divisors (see below), whose sum is σ = 189928260. Its totient is φ = 50563200.

The previous prime is 101210699. The next prime is 101210729. The reversal of 101210728 is 827012101.

It can be written as a sum of positive squares in 2 ways, for example, as 100040004 + 1170724 = 10002^2 + 1082^2 .

It is a super-2 number, since 2×101210728² = 20487222924579968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101210699 and 101210708.

It is not an unprimeable number, because it can be changed into a prime (101210729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6468 + ... + 15628.

Almost surely, 2^101210728 is an apocalyptic number.

It is an amenable number.

101210728 is a deficient number, since it is larger than the sum of its proper divisors (88717532).

101210728 is a wasteful number, since it uses less digits than its factorization.

101210728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10548 (or 10544 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 101210728 is about 10060.3542681160. The cubic root of 101210728 is about 466.0246077374.

Adding to 101210728 its reverse (827012101), we get a palindrome (928222829).

The spelling of 101210728 in words is "one hundred one million, two hundred ten thousand, seven hundred twenty-eight".