1320640572 has 24 divisors (see below), whose sum is σ = 3082240000. Its totient is φ = 440107056.

The previous prime is 1320640567. The next prime is 1320640577. The reversal of 1320640572 is 2750460231.

It is an interprime number because it is at equal distance from previous prime (1320640567) and next prime (1320640577).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320640577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50679 + ... + 72177.

Almost surely, 2^1320640572 is an apocalyptic number.

1320640572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1320640572 is an abundant number, since it is smaller than the sum of its proper divisors (1761599428).

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

1320640572 is a wasteful number, since it uses less digits than its factorization.

1320640572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26625 (or 26623 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 1320640572 is about 36340.6187619308. The cubic root of 1320640572 is about 1097.1387269170.

The spelling of 1320640572 in words is "one billion, three hundred twenty million, six hundred forty thousand, five hundred seventy-two".