106720390 has 32 divisors (see below), whose sum is σ = 232455744. Its totient is φ = 34437120.

The previous prime is 106720387. The next prime is 106720421. The reversal of 106720390 is 93027601.

It is a super-2 number, since 2×106720390² = 22778483283504200, 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43651 + ... + 46030.

It is an arithmetic number, because the mean of its divisors is an integer number (7264242).

Almost surely, 2^106720390 is an apocalyptic number.

106720390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

106720390 is an abundant number, since it is smaller than the sum of its proper divisors (125735354).

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

106720390 is a wasteful number, since it uses less digits than its factorization.

106720390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89712.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 106720390 is about 10330.5561321741. The cubic root of 106720390 is about 474.3320473040.

Adding to 106720390 its reverse (93027601), we get a palindrome (199747991).

The spelling of 106720390 in words is "one hundred six million, seven hundred twenty thousand, three hundred ninety".