63400686 has 16 divisors (see below), whose sum is σ = 127801344. Its totient is φ = 20966904.

The previous prime is 63400681. The next prime is 63400691. The reversal of 63400686 is 68600436.

It is an interprime number because it is at equal distance from previous prime (63400681) and next prime (63400691).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63400681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40840 + ... + 42363.

It is an arithmetic number, because the mean of its divisors is an integer number (7987584).

Almost surely, 2^63400686 is an apocalyptic number.

63400686 is an abundant number, since it is smaller than the sum of its proper divisors (64400658).

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

63400686 is a wasteful number, since it uses less digits than its factorization.

63400686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83335.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 63400686 is about 7962.4547722420. The cubic root of 63400686 is about 398.7475114411.

The spelling of 63400686 in words is "sixty-three million, four hundred thousand, six hundred eighty-six".