63103440 has 80 divisors (see below), whose sum is σ = 196612416. Its totient is φ = 16742400.

The previous prime is 63103399. The next prime is 63103441. The reversal of 63103440 is 4430136.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63103441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57295 + ... + 58385.

Almost surely, 2^63103440 is an apocalyptic number.

63103440 is a gapful number since it is divisible by the number (60) 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 63103440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98306208).

63103440 is an abundant number, since it is smaller than the sum of its proper divisors (133508976).

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

63103440 is a wasteful number, since it uses less digits than its factorization.

63103440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348 (or 1342 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 63103440 is about 7943.7673681950. The cubic root of 63103440 is about 398.1233761425.

Adding to 63103440 its reverse (4430136), we get a palindrome (67533576).

The spelling of 63103440 in words is "sixty-three million, one hundred three thousand, four hundred forty".