1022720520 has 32 divisors (see below), whose sum is σ = 3068161920. Its totient is φ = 272725440.

The previous prime is 1022720483. The next prime is 1022720533. The reversal of 1022720520 is 250272201.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4261216 + ... + 4261455.

It is an arithmetic number, because the mean of its divisors is an integer number (95880060).

Almost surely, 2^1022720520 is an apocalyptic number.

1022720520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022720520 is an abundant number, since it is smaller than the sum of its proper divisors (2045441400).

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

1022720520 is a wasteful number, since it uses less digits than its factorization.

1022720520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8522685 (or 8522681 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 1022720520 is about 31980.0018761726. The cubic root of 1022720520 is about 1007.5168618786.

Adding to 1022720520 its reverse (250272201), we get a palindrome (1272992721).

The spelling of 1022720520 in words is "one billion, twenty-two million, seven hundred twenty thousand, five hundred twenty".