63993420 has 36 divisors (see below), whose sum is σ = 194113920. Its totient is φ = 17064864.

The previous prime is 63993409. The next prime is 63993421. The reversal of 63993420 is 2439936.

It is a happy number.

63993420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (63993421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177580 + ... + 177939.

Almost surely, 2^63993420 is an apocalyptic number.

63993420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63993420 is an abundant number, since it is smaller than the sum of its proper divisors (130120500).

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

63993420 is a wasteful number, since it uses less digits than its factorization.

63993420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355534 (or 355529 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 63993420 is about 7999.5887394290. The cubic root of 63993420 is about 399.9862911968.

The spelling of 63993420 in words is "sixty-three million, nine hundred ninety-three thousand, four hundred twenty".