63997140 has 24 divisors (see below), whose sum is σ = 179192160. Its totient is φ = 17065888.

The previous prime is 63997117. The next prime is 63997159. The reversal of 63997140 is 4179936.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 533250 + ... + 533369.

It is an arithmetic number, because the mean of its divisors is an integer number (7466340).

Almost surely, 2^63997140 is an apocalyptic number.

63997140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63997140 is an abundant number, since it is smaller than the sum of its proper divisors (115195020).

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

63997140 is a wasteful number, since it uses less digits than its factorization.

63997140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066631 (or 1066629 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 63997140 is about 7999.8212480030. The cubic root of 63997140 is about 399.9940415779.

It can be divided in two parts, 639 and 97140, that added together give a palindrome (97779).

The spelling of 63997140 in words is "sixty-three million, nine hundred ninety-seven thousand, one hundred forty".