106921920 has 168 divisors, whose sum is σ = 395075664. Its totient is φ = 24428544.

The previous prime is 106921909. The next prime is 106921921. The reversal of 106921920 is 29129601.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (168).

It is a super-2 number, since 2×106921920² = 22864593952972800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106921921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45904 + ... + 48176.

Almost surely, 2^106921920 is an apocalyptic number.

106921920 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 106921920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197537832).

106921920 is an abundant number, since it is smaller than the sum of its proper divisors (288153744).

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

106921920 is a wasteful number, since it uses less digits than its factorization.

106921920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2307 (or 2290 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 106921920 is about 10340.3056047682. The cubic root of 106921920 is about 474.6304346091.

The spelling of 106921920 in words is "one hundred six million, nine hundred twenty-one thousand, nine hundred twenty".