63469440 has 128 divisors (see below), whose sum is σ = 224848800. Its totient is φ = 16920576.

The previous prime is 63469421. The next prime is 63469447. The reversal of 63469440 is 4496436.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is a junction number, because it is equal to n+sod(n) for n = 63469395 and 63469404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63469447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15444 + ... + 19116.

Almost surely, 2^63469440 is an apocalyptic number.

63469440 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 63469440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112424400).

63469440 is an abundant number, since it is smaller than the sum of its proper divisors (161379360).

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

63469440 is a wasteful number, since it uses less digits than its factorization.

63469440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3701 (or 3683 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 63469440 is about 7966.7709895540. The cubic root of 63469440 is about 398.8915981168.

The spelling of 63469440 in words is "sixty-three million, four hundred sixty-nine thousand, four hundred forty".