63307440 has 320 divisors, whose sum is σ = 257126400. Its totient is φ = 14017536.

The previous prime is 63307423. The next prime is 63307451. The reversal of 63307440 is 4470336.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 801321 + ... + 801399.

It is an arithmetic number, because the mean of its divisors is an integer number (803520).

Almost surely, 2^63307440 is an apocalyptic number.

63307440 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 63307440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128563200).

63307440 is an abundant number, since it is smaller than the sum of its proper divisors (193818960).

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

63307440 is a wasteful number, since it uses less digits than its factorization.

63307440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 63307440 is about 7956.5972626494. The cubic root of 63307440 is about 398.5519307311.

Adding to 63307440 its reverse (4470336), we get a palindrome (67777776).

The spelling of 63307440 in words is "sixty-three million, three hundred seven thousand, four hundred forty".