100857380 has 24 divisors (see below), whose sum is σ = 228093432. Its totient is φ = 37239552.

The previous prime is 100857349. The next prime is 100857397. The reversal of 100857380 is 83758001.

It can be written as a sum of positive squares in 4 ways, for example, as 2292196 + 98565184 = 1514^2 + 9928^2 .

It is a super-2 number, since 2×100857380² = 20344422200928800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193697 + ... + 194216.

It is an arithmetic number, because the mean of its divisors is an integer number (9503893).

Almost surely, 2^100857380 is an apocalyptic number.

100857380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100857380 is an abundant number, since it is smaller than the sum of its proper divisors (127236052).

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

100857380 is a wasteful number, since it uses less digits than its factorization.

100857380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387935 (or 387933 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 100857380 is about 10042.7775042565. Note that the first 3 decimals coincide. The cubic root of 100857380 is about 465.4816453125.

The spelling of 100857380 in words is "one hundred million, eight hundred fifty-seven thousand, three hundred eighty".