63847620 has 72 divisors (see below), whose sum is σ = 197817984. Its totient is φ = 16661568.

The previous prime is 63847613. The next prime is 63847627. The reversal of 63847620 is 2674836.

It is an interprime number because it is at equal distance from previous prime (63847613) and next prime (63847627).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (63847627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4687 + ... + 12233.

It is an arithmetic number, because the mean of its divisors is an integer number (2747472).

Almost surely, 2^63847620 is an apocalyptic number.

63847620 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 63847620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98908992).

63847620 is an abundant number, since it is smaller than the sum of its proper divisors (133970364).

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

63847620 is a wasteful number, since it uses less digits than its factorization.

63847620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7609 (or 7604 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 63847620 is about 7990.4705743780. The cubic root of 63847620 is about 399.6822893834.

The spelling of 63847620 in words is "sixty-three million, eight hundred forty-seven thousand, six hundred twenty".