63925840 has 40 divisors (see below), whose sum is σ = 162141408. Its totient is φ = 23245440.

The previous prime is 63925811. The next prime is 63925843. The reversal of 63925840 is 4852936.

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

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 63925840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63925843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35442 + ... + 37201.

Almost surely, 2^63925840 is an apocalyptic number.

It is an amenable number.

63925840 is an abundant number, since it is smaller than the sum of its proper divisors (98215568).

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

63925840 is a wasteful number, since it uses less digits than its factorization.

63925840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72667 (or 72661 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 63925840 is about 7995.3636565199. The cubic root of 63925840 is about 399.8454402859.

The spelling of 63925840 in words is "sixty-three million, nine hundred twenty-five thousand, eight hundred forty".