63215940 has 96 divisors (see below), whose sum is σ = 187246080. Its totient is φ = 15909376.

The previous prime is 63215939. The next prime is 63215953. The reversal of 63215940 is 4951236.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 63215898 and 63215907.

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 31 ways as a sum of consecutive naturals, for example, 81394 + ... + 82166.

It is an arithmetic number, because the mean of its divisors is an integer number (1950480).

Almost surely, 2^63215940 is an apocalyptic number.

63215940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63215940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93623040).

63215940 is an abundant number, since it is smaller than the sum of its proper divisors (124030140).

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

63215940 is a wasteful number, since it uses less digits than its factorization.

63215940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 63215940 is about 7950.8452380863. The cubic root of 63215940 is about 398.3598254275.

The spelling of 63215940 in words is "sixty-three million, two hundred fifteen thousand, nine hundred forty".