1220030391 has 8 divisors (see below), whose sum is σ = 1627378560. Its totient is φ = 813017912.

The previous prime is 1220030353. The next prime is 1220030411. The reversal of 1220030391 is 1930300221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220030391 - 2¹⁴ = 1220014007 is a prime.

It is a super-2 number, since 2×1220030391² = 2976948309927225762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220030311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75315 + ... + 90068.

It is an arithmetic number, because the mean of its divisors is an integer number (203422320).

Almost surely, 2^1220030391 is an apocalyptic number.

1220030391 is a deficient number, since it is larger than the sum of its proper divisors (407348169).

1220030391 is a wasteful number, since it uses less digits than its factorization.

1220030391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167845.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 1220030391 is about 34928.9334363361. The cubic root of 1220030391 is about 1068.5386026673.

The spelling of 1220030391 in words is "one billion, two hundred twenty million, thirty thousand, three hundred ninety-one".