1029248640 has 512 divisors, whose sum is σ = 4261478400. Its totient is φ = 229920768.

The previous prime is 1029248621. The next prime is 1029248651. The reversal of 1029248640 is 468429201.

1029248640 is a `hidden beast` number, since 1 + 0 + 2 + 9 + 2 + 4 + 8 + 640 = 666.

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 = 1029248595 and 1029248604.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 8104257 + ... + 8104383.

It is an arithmetic number, because the mean of its divisors is an integer number (8323200).

Almost surely, 2^1029248640 is an apocalyptic number.

1029248640 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 1029248640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2130739200).

1029248640 is an abundant number, since it is smaller than the sum of its proper divisors (3232229760).

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

1029248640 is a wasteful number, since it uses less digits than its factorization.

1029248640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1029248640 is about 32081.9051803349. The cubic root of 1029248640 is about 1009.6560080709.

The spelling of 1029248640 in words is "one billion, twenty-nine million, two hundred forty-eight thousand, six hundred forty".