100122840 has 48 divisors (see below), whose sum is σ = 325400400. Its totient is φ = 26699328.

The previous prime is 100122833. The next prime is 100122881. The reversal of 100122840 is 48221001.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138700 + ... + 139419.

It is an arithmetic number, because the mean of its divisors is an integer number (6779175).

Almost surely, 2^100122840 is an apocalyptic number.

100122840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100122840 is an abundant number, since it is smaller than the sum of its proper divisors (225277560).

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

100122840 is a wasteful number, since it uses less digits than its factorization.

100122840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278136 (or 278129 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 100122840 is about 10006.1401149494. The cubic root of 100122840 is about 464.3488631829.

Adding to 100122840 its reverse (48221001), we get a palindrome (148343841).

The spelling of 100122840 in words is "one hundred million, one hundred twenty-two thousand, eight hundred forty".