103021440 has 64 divisors (see below), whose sum is σ = 328386960. Its totient is φ = 27471872.

The previous prime is 103021423. The next prime is 103021483. The reversal of 103021440 is 44120301.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×103021440² = 21226834199347200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 24909 + ... + 28748.

Almost surely, 2^103021440 is an apocalyptic number.

103021440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103021440 is an abundant number, since it is smaller than the sum of its proper divisors (225365520).

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

103021440 is an equidigital number, since it uses as much as digits as its factorization.

103021440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53679 (or 53667 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 103021440 is about 10149.9477831169. The cubic root of 103021440 is about 468.7873371148.

Adding to 103021440 its reverse (44120301), we get a palindrome (147141741).

The spelling of 103021440 in words is "one hundred three million, twenty-one thousand, four hundred forty".