105977820 has 96 divisors (see below), whose sum is σ = 336430080. Its totient is φ = 24710400.

The previous prime is 105977797. The next prime is 105977827. The reversal of 105977820 is 28779501.

It is a super-2 number, since 2×105977820² = 22462596663904800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105977827) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11245 + ... + 18395.

It is an arithmetic number, because the mean of its divisors is an integer number (3504480).

Almost surely, 2^105977820 is an apocalyptic number.

105977820 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 105977820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168215040).

105977820 is an abundant number, since it is smaller than the sum of its proper divisors (230452260).

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

105977820 is a wasteful number, since it uses less digits than its factorization.

105977820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7195 (or 7193 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 105977820 is about 10294.5529286123. The cubic root of 105977820 is about 473.2293375090.

The spelling of 105977820 in words is "one hundred five million, nine hundred seventy-seven thousand, eight hundred twenty".