63400620 has 48 divisors (see below), whose sum is σ = 179262720. Its totient is φ = 16741056.

The previous prime is 63400609. The next prime is 63400639. The reversal of 63400620 is 2600436.

63400620 = 733² + 734² + ... + 835².

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1051 + ... + 11309.

It is an arithmetic number, because the mean of its divisors is an integer number (3734640).

Almost surely, 2^63400620 is an apocalyptic number.

63400620 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 63400620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89631360).

63400620 is an abundant number, since it is smaller than the sum of its proper divisors (115862100).

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

63400620 is a wasteful number, since it uses less digits than its factorization.

63400620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10374 (or 10372 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 63400620 is about 7962.4506277904. The cubic root of 63400620 is about 398.7473730759.

The spelling of 63400620 in words is "sixty-three million, four hundred thousand, six hundred twenty".