63509390 has 96 divisors (see below), whose sum is σ = 142228224. Its totient is φ = 20321280.

The previous prime is 63509389. The next prime is 63509393. The reversal of 63509390 is 9390536.

63509390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 63509390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63509393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 561974 + ... + 562086.

It is an arithmetic number, because the mean of its divisors is an integer number (1481544).

Almost surely, 2^63509390 is an apocalyptic number.

63509390 is an abundant number, since it is smaller than the sum of its proper divisors (78718834).

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

63509390 is a wasteful number, since it uses less digits than its factorization.

63509390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 35.

The square root of 63509390 is about 7969.2778844761. The cubic root of 63509390 is about 398.9752729110.

The spelling of 63509390 in words is "sixty-three million, five hundred nine thousand, three hundred ninety".