63400780 has 12 divisors (see below), whose sum is σ = 133141680. Its totient is φ = 25360304.

The previous prime is 63400763. The next prime is 63400781. The reversal of 63400780 is 8700436.

It is not an unprimeable number, because it can be changed into a prime (63400781) 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, 1585000 + ... + 1585039.

It is an arithmetic number, because the mean of its divisors is an integer number (11095140).

Almost surely, 2^63400780 is an apocalyptic number.

It is an amenable number.

63400780 is an abundant number, since it is smaller than the sum of its proper divisors (69740900).

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

63400780 is a wasteful number, since it uses less digits than its factorization.

63400780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3170048 (or 3170046 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 63400780 is about 7962.4606749421. The cubic root of 63400780 is about 398.7477085065.

The spelling of 63400780 in words is "sixty-three million, four hundred thousand, seven hundred eighty".