103402440 has 128 divisors (see below), whose sum is σ = 350064000. Its totient is φ = 27143424.

The previous prime is 103402433. The next prime is 103402441. The reversal of 103402440 is 44204301.

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

It is not an unprimeable number, because it can be changed into a prime (103402441) 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 31 ways as a sum of consecutive naturals, for example, 71646 + ... + 73074.

It is an arithmetic number, because the mean of its divisors is an integer number (2734875).

Almost surely, 2^103402440 is an apocalyptic number.

103402440 is a gapful number since it is divisible by the number (10) 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 103402440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175032000).

103402440 is an abundant number, since it is smaller than the sum of its proper divisors (246661560).

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

103402440 is a wasteful number, since it uses less digits than its factorization.

103402440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516 (or 1506 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 103402440 is about 10168.6990318329. The cubic root of 103402440 is about 469.3645252133.

Adding to 103402440 its reverse (44204301), we get a palindrome (147606741).

The spelling of 103402440 in words is "one hundred three million, four hundred two thousand, four hundred forty".