63642940 has 12 divisors (see below), whose sum is σ = 133650216. Its totient is φ = 25457168.

The previous prime is 63642937. The next prime is 63642941. The reversal of 63642940 is 4924636.

It is a junction number, because it is equal to n+sod(n) for n = 63642896 and 63642905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63642941) 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, 1591054 + ... + 1591093.

It is an arithmetic number, because the mean of its divisors is an integer number (11137518).

Almost surely, 2^63642940 is an apocalyptic number.

It is an amenable number.

63642940 is an abundant number, since it is smaller than the sum of its proper divisors (70007276).

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

63642940 is a wasteful number, since it uses less digits than its factorization.

63642940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3182156 (or 3182154 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 63642940 is about 7977.6525369309. The cubic root of 63642940 is about 399.2547373212.

The spelling of 63642940 in words is "sixty-three million, six hundred forty-two thousand, nine hundred forty".