1217950320 has 160 divisors (see below), whose sum is σ = 3931176960. Its totient is φ = 311592960.

The previous prime is 1217950319. The next prime is 1217950343. The reversal of 1217950320 is 230597121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 944236 + ... + 945524.

It is an arithmetic number, because the mean of its divisors is an integer number (24569856).

Almost surely, 2^1217950320 is an apocalyptic number.

1217950320 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 1217950320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1965588480).

1217950320 is an abundant number, since it is smaller than the sum of its proper divisors (2713226640).

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

1217950320 is a wasteful number, since it uses less digits than its factorization.

1217950320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463 (or 1457 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 1217950320 is about 34899.1449751996. The cubic root of 1217950320 is about 1067.9309947139.

The spelling of 1217950320 in words is "one billion, two hundred seventeen million, nine hundred fifty thousand, three hundred twenty".