1073642220 has 144 divisors (see below), whose sum is σ = 3842162688. Its totient is φ = 237479040.

The previous prime is 1073642201. The next prime is 1073642239. The reversal of 1073642220 is 222463701.

1073642220 is a `hidden beast` number, since 10 + 7 + 3 + 642 + 2 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1073642201) and next prime (1073642239).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25317 + ... + 52803.

Almost surely, 2^1073642220 is an apocalyptic number.

1073642220 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 1073642220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1921081344).

1073642220 is an abundant number, since it is smaller than the sum of its proper divisors (2768520468).

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

1073642220 is a wasteful number, since it uses less digits than its factorization.

1073642220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27540 (or 27535 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 1073642220 is about 32766.4801283263. The cubic root of 1073642220 is about 1023.9683357620.

The spelling of 1073642220 in words is "one billion, seventy-three million, six hundred forty-two thousand, two hundred twenty".