1210645320 has 64 divisors (see below), whose sum is σ = 3636040320. Its totient is φ = 322473984.

The previous prime is 1210645309. The next prime is 1210645343. The reversal of 1210645320 is 235460121.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 15 ways as a sum of consecutive naturals, for example, 110824 + ... + 121256.

It is an arithmetic number, because the mean of its divisors is an integer number (56813130).

Almost surely, 2^1210645320 is an apocalyptic number.

1210645320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210645320 is an abundant number, since it is smaller than the sum of its proper divisors (2425395000).

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

1210645320 is a wasteful number, since it uses less digits than its factorization.

1210645320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11414 (or 11410 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1210645320 is about 34794.3288482477. The cubic root of 1210645320 is about 1065.7916395833.

The spelling of 1210645320 in words is "one billion, two hundred ten million, six hundred forty-five thousand, three hundred twenty".