1220854460 has 24 divisors (see below), whose sum is σ = 2930051040. Its totient is φ = 418578624.

The previous prime is 1220854457. The next prime is 1220854463. The reversal of 1220854460 is 644580221.

It is an interprime number because it is at equal distance from previous prime (1220854457) and next prime (1220854463).

It is a super-2 number, since 2×1220854460² = 2980971225003783200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220854463) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4360055 + ... + 4360334.

It is an arithmetic number, because the mean of its divisors is an integer number (122085460).

Almost surely, 2^1220854460 is an apocalyptic number.

1220854460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220854460 is an abundant number, since it is smaller than the sum of its proper divisors (1709196580).

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

1220854460 is a wasteful number, since it uses less digits than its factorization.

1220854460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8720405 (or 8720403 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 1220854460 is about 34940.7278115382. The cubic root of 1220854460 is about 1068.7791298331.

The spelling of 1220854460 in words is "one billion, two hundred twenty million, eight hundred fifty-four thousand, four hundred sixty".