1220310432 has 72 divisors (see below), whose sum is σ = 3785745600. Its totient is φ = 369790080.

The previous prime is 1220310409. The next prime is 1220310467. The reversal of 1220310432 is 2340130221.

1220310432 is a `hidden beast` number, since 1 + 220 + 3 + 10 + 432 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189432 + ... + 195767.

It is an arithmetic number, because the mean of its divisors is an integer number (52579800).

Almost surely, 2^1220310432 is an apocalyptic number.

1220310432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220310432 is an abundant number, since it is smaller than the sum of its proper divisors (2565435168).

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

1220310432 is a wasteful number, since it uses less digits than its factorization.

1220310432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385226 (or 385215 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1220310432 is about 34932.9419316496. The cubic root of 1220310432 is about 1068.6203524687.

Adding to 1220310432 its reverse (2340130221), we get a palindrome (3560440653).

The spelling of 1220310432 in words is "one billion, two hundred twenty million, three hundred ten thousand, four hundred thirty-two".