1330640220 has 96 divisors (see below), whose sum is σ = 4585609728. Its totient is φ = 280749312.

The previous prime is 1330640219. The next prime is 1330640221. The reversal of 1330640220 is 220460331.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1330640219) and next prime (1330640221).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330640221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116394 + ... + 127313.

It is an arithmetic number, because the mean of its divisors is an integer number (47766768).

Almost surely, 2^1330640220 is an apocalyptic number.

1330640220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1330640220 is an abundant number, since it is smaller than the sum of its proper divisors (3254969508).

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

1330640220 is a wasteful number, since it uses less digits than its factorization.

1330640220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243739 (or 243737 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1330640220 is about 36477.9415537664. The cubic root of 1330640220 is about 1099.9008781207.

The spelling of 1330640220 in words is "one billion, three hundred thirty million, six hundred forty thousand, two hundred twenty".