1220374540 has 144 divisors (see below), whose sum is σ = 3274915392. Its totient is φ = 373824000.

The previous prime is 1220374531. The next prime is 1220374577. The reversal of 1220374540 is 454730221.

1220374540 is nontrivially palindromic in base 3.

It is a Harshad number since it is a multiple of its sum of digits (28).

1220374540 is an undulating number in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 1220374499 and 1220374508.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1032750 + ... + 1033930.

It is an arithmetic number, because the mean of its divisors is an integer number (22742468).

Almost surely, 2^1220374540 is an apocalyptic number.

1220374540 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 1220374540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1637457696).

1220374540 is an abundant number, since it is smaller than the sum of its proper divisors (2054540852).

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

1220374540 is a wasteful number, since it uses less digits than its factorization.

1220374540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 1220374540 is about 34933.8595062155. The cubic root of 1220374540 is about 1068.6390651701.

The spelling of 1220374540 in words is "one billion, two hundred twenty million, three hundred seventy-four thousand, five hundred forty".