106720428 has 24 divisors (see below), whose sum is σ = 249908400. Its totient is φ = 35445760.

The previous prime is 106720421. The next prime is 106720457. The reversal of 106720428 is 824027601.

It is a super-2 number, since 2×106720428² = 22778499505006368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 106720395 and 106720404.

It is not an unprimeable number, because it can be changed into a prime (106720421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12453 + ... + 19196.

It is an arithmetic number, because the mean of its divisors is an integer number (10412850).

Almost surely, 2^106720428 is an apocalyptic number.

It is an amenable number.

106720428 is an abundant number, since it is smaller than the sum of its proper divisors (143187972).

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

106720428 is a wasteful number, since it uses less digits than its factorization.

106720428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31937 (or 31935 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 106720428 is about 10330.5579713779. The cubic root of 106720428 is about 474.3321036025.

The spelling of 106720428 in words is "one hundred six million, seven hundred twenty thousand, four hundred twenty-eight".