63320240 has 40 divisors (see below), whose sum is σ = 155882880. Its totient is φ = 23837696.

The previous prime is 63320239. The next prime is 63320251. The reversal of 63320240 is 4202336.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21920 + ... + 24639.

It is an arithmetic number, because the mean of its divisors is an integer number (3897072).

Almost surely, 2^63320240 is an apocalyptic number.

It is an amenable number.

63320240 is an abundant number, since it is smaller than the sum of its proper divisors (92562640).

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

63320240 is a wasteful number, since it uses less digits than its factorization.

63320240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46589 (or 46583 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 63320240 is about 7957.4015859450. The cubic root of 63320240 is about 398.5787897171.

Adding to 63320240 its reverse (4202336), we get a palindrome (67522576).

The spelling of 63320240 in words is "sixty-three million, three hundred twenty thousand, two hundred forty".