100520780 has 24 divisors (see below), whose sum is σ = 215587008. Its totient is φ = 39352448.

The previous prime is 100520767. The next prime is 100520789. The reversal of 100520780 is 87025001.

It is not an unprimeable number, because it can be changed into a prime (100520789) 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 7 ways as a sum of consecutive naturals, for example, 52529 + ... + 54408.

It is an arithmetic number, because the mean of its divisors is an integer number (8982792).

Almost surely, 2^100520780 is an apocalyptic number.

100520780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100520780 is an abundant number, since it is smaller than the sum of its proper divisors (115066228).

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

100520780 is a wasteful number, since it uses less digits than its factorization.

100520780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106993 (or 106991 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 100520780 is about 10026.0051865137. The cubic root of 100520780 is about 464.9632375454.

Adding to 100520780 its reverse (87025001), we get a palindrome (187545781).

The spelling of 100520780 in words is "one hundred million, five hundred twenty thousand, seven hundred eighty".