63494840 has 32 divisors (see below), whose sum is σ = 143095680. Its totient is φ = 25356672.

The previous prime is 63494831. The next prime is 63494843. The reversal of 63494840 is 4849436.

It is a junction number, because it is equal to n+sod(n) for n = 63494794 and 63494803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63494843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39737 + ... + 41303.

It is an arithmetic number, because the mean of its divisors is an integer number (4471740).

Almost surely, 2^63494840 is an apocalyptic number.

It is an amenable number.

63494840 is an abundant number, since it is smaller than the sum of its proper divisors (79600840).

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

63494840 is a wasteful number, since it uses less digits than its factorization.

63494840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591 (or 2587 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 63494840 is about 7968.3649514816. The cubic root of 63494840 is about 398.9448021749.

The spelling of 63494840 in words is "sixty-three million, four hundred ninety-four thousand, eight hundred forty".