1220312352 has 48 divisors (see below), whose sum is σ = 3660939072. Its totient is φ = 348660480.

The previous prime is 1220312341. The next prime is 1220312369. The reversal of 1220312352 is 2532130221.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907299 + ... + 908642.

It is an arithmetic number, because the mean of its divisors is an integer number (76269564).

Almost surely, 2^1220312352 is an apocalyptic number.

1220312352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220312352 is an abundant number, since it is smaller than the sum of its proper divisors (2440626720).

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

1220312352 is a wasteful number, since it uses less digits than its factorization.

1220312352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815961 (or 1815953 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1220312352 is about 34932.9694128627. The cubic root of 1220312352 is about 1068.6209129136.

Adding to 1220312352 its reverse (2532130221), we get a palindrome (3752442573).

The spelling of 1220312352 in words is "one billion, two hundred twenty million, three hundred twelve thousand, three hundred fifty-two".