103645890 has 96 divisors (see below), whose sum is σ = 277992000. Its totient is φ = 26782080.

The previous prime is 103645879. The next prime is 103645891. The reversal of 103645890 is 98546301.

103645890 is a `hidden beast` number, since 1 + 0 + 3 + 645 + 8 + 9 + 0 = 666.

It is a super-3 number, since 3×103645890³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (103645891) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 695536 + ... + 695684.

It is an arithmetic number, because the mean of its divisors is an integer number (2895750).

Almost surely, 2^103645890 is an apocalyptic number.

103645890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 103645890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138996000).

103645890 is an abundant number, since it is smaller than the sum of its proper divisors (174346110).

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

103645890 is a wasteful number, since it uses less digits than its factorization.

103645890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 103645890 is about 10180.6625521132. The cubic root of 103645890 is about 469.7325927188.

The spelling of 103645890 in words is "one hundred three million, six hundred forty-five thousand, eight hundred ninety".