1207249920 has 440 divisors, whose sum is σ = 4494032928. Its totient is φ = 309657600.

The previous prime is 1207249913. The next prime is 1207249969. The reversal of 1207249920 is 299427021.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 39 ways as a sum of consecutive naturals, for example, 17003485 + ... + 17003555.

Almost surely, 2^1207249920 is an apocalyptic number.

1207249920 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 1207249920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2247016464).

1207249920 is an abundant number, since it is smaller than the sum of its proper divisors (3286783008).

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

1207249920 is an equidigital number, since it uses as much as digits as its factorization.

1207249920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1207249920 is about 34745.5021549553. The cubic root of 1207249920 is about 1064.7943264799.

The spelling of 1207249920 in words is "one billion, two hundred seven million, two hundred forty-nine thousand, nine hundred twenty".