63840930 has 16 divisors (see below), whose sum is σ = 153218304. Its totient is φ = 17024240.

The previous prime is 63840929. The next prime is 63840937. The reversal of 63840930 is 3904836.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 63840891 and 63840900.

It is not an unprimeable number, because it can be changed into a prime (63840937) 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, 1063986 + ... + 1064045.

It is an arithmetic number, because the mean of its divisors is an integer number (9576144).

Almost surely, 2^63840930 is an apocalyptic number.

63840930 is an abundant number, since it is smaller than the sum of its proper divisors (89377374).

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

63840930 is a wasteful number, since it uses less digits than its factorization.

63840930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128041.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 63840930 is about 7990.0519397561. The cubic root of 63840930 is about 399.6683292289.

The spelling of 63840930 in words is "sixty-three million, eight hundred forty thousand, nine hundred thirty".