1220673400 has 24 divisors (see below), whose sum is σ = 2838066120. Its totient is φ = 488269280.

The previous prime is 1220673383. The next prime is 1220673407. The reversal of 1220673400 is 43760221.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220673407) 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 5 ways as a sum of consecutive naturals, for example, 3051484 + ... + 3051883.

It is an arithmetic number, because the mean of its divisors is an integer number (118252755).

Almost surely, 2^1220673400 is an apocalyptic number.

1220673400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220673400 is an abundant number, since it is smaller than the sum of its proper divisors (1617392720).

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

1220673400 is a wasteful number, since it uses less digits than its factorization.

1220673400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6103383 (or 6103374 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 1220673400 is about 34938.1367562725. The cubic root of 1220673400 is about 1068.7262917805.

The spelling of 1220673400 in words is "one billion, two hundred twenty million, six hundred seventy-three thousand, four hundred".