63943240 has 16 divisors (see below), whose sum is σ = 143872380. Its totient is φ = 25577280.

The previous prime is 63943237. The next prime is 63943241. The reversal of 63943240 is 4234936.

It can be written as a sum of positive squares in 2 ways, for example, as 63904036 + 39204 = 7994^2 + 198^2 .

It is not an unprimeable number, because it can be changed into a prime (63943241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 799251 + ... + 799330.

Almost surely, 2^63943240 is an apocalyptic number.

It is an amenable number.

63943240 is an abundant number, since it is smaller than the sum of its proper divisors (79929140).

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

63943240 is a wasteful number, since it uses less digits than its factorization.

63943240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598592 (or 1598588 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 63943240 is about 7996.4517131038. The cubic root of 63943240 is about 399.8817150251.

The spelling of 63943240 in words is "sixty-three million, nine hundred forty-three thousand, two hundred forty".