1022001240 has 256 divisors, whose sum is σ = 3543523200. Its totient is φ = 233570304.

The previous prime is 1022001187. The next prime is 1022001289. The reversal of 1022001240 is 421002201.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 2360064 + ... + 2360496.

Almost surely, 2^1022001240 is an apocalyptic number.

1022001240 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 1022001240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1771761600).

1022001240 is an abundant number, since it is smaller than the sum of its proper divisors (2521521960).

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

1022001240 is a wasteful number, since it uses less digits than its factorization.

1022001240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1022001240 is about 31968.7541202343. The cubic root of 1022001240 is about 1007.2806107322.

Adding to 1022001240 its reverse (421002201), we get a palindrome (1443003441).

The spelling of 1022001240 in words is "one billion, twenty-two million, one thousand, two hundred forty".