1016432640 has 288 divisors, whose sum is σ = 3622109400. Its totient is φ = 263454720.

The previous prime is 1016432621. The next prime is 1016432657. The reversal of 1016432640 is 462346101.

1016432640 is a `hidden beast` number, since 1 + 0 + 16 + 4 + 3 + 2 + 640 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 288728064 + 727704576 = 16992^2 + 26976^2 .

It is a tau number, because it is divible by the number of its divisors (288).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3778426 + ... + 3778694.

Almost surely, 2^1016432640 is an apocalyptic number.

1016432640 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 1016432640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1811054700).

1016432640 is an abundant number, since it is smaller than the sum of its proper divisors (2605676760).

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

1016432640 is a wasteful number, since it uses less digits than its factorization.

1016432640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1016432640 is about 31881.5407406857. The cubic root of 1016432640 is about 1005.4478140936.

Adding to 1016432640 its reverse (462346101), we get a palindrome (1478778741).

The spelling of 1016432640 in words is "one billion, sixteen million, four hundred thirty-two thousand, six hundred forty".