103117428 has 48 divisors (see below), whose sum is σ = 269304000. Its totient is φ = 34120224.

The previous prime is 103117411. The next prime is 103117429. The reversal of 103117428 is 824711301.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103117429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11578 + ... + 18446.

It is an arithmetic number, because the mean of its divisors is an integer number (5610500).

Almost surely, 2^103117428 is an apocalyptic number.

103117428 is a gapful number since it is divisible by the number (18) 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 103117428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134652000).

103117428 is an abundant number, since it is smaller than the sum of its proper divisors (166186572).

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

103117428 is a wasteful number, since it uses less digits than its factorization.

103117428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7021 (or 7013 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 103117428 is about 10154.6751794432. The cubic root of 103117428 is about 468.9328860764.

Adding to 103117428 its reverse (824711301), we get a palindrome (927828729).

The spelling of 103117428 in words is "one hundred three million, one hundred seventeen thousand, four hundred twenty-eight".