1063549440 has 400 divisors, whose sum is σ = 3992744448. Its totient is φ = 270065664.

The previous prime is 1063549397. The next prime is 1063549441. The reversal of 1063549440 is 449453601.

1063549440 is a `hidden beast` number, since 10 + 63 + 549 + 4 + 40 = 666.

It is a super-2 number, since 2×1063549440² = 2262274822648627200, which contains 22 as substring.

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 = 1063549395 and 1063549404.

It is not an unprimeable number, because it can be changed into a prime (1063549441) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4769169 + ... + 4769391.

Almost surely, 2^1063549440 is an apocalyptic number.

1063549440 is a gapful number since it is divisible by the number (10) 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 1063549440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1996372224).

1063549440 is an abundant number, since it is smaller than the sum of its proper divisors (2929195008).

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

1063549440 is an equidigital number, since it uses as much as digits as its factorization.

1063549440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1063549440 is about 32612.1057277815. The cubic root of 1063549440 is about 1020.7496219606.

The spelling of 1063549440 in words is "one billion, sixty-three million, five hundred forty-nine thousand, four hundred forty".