1228057740 has 384 divisors, whose sum is σ = 4785285120. Its totient is φ = 254555136.

The previous prime is 1228057717. The next prime is 1228057759. The reversal of 1228057740 is 477508221.

1228057740 is a `hidden beast` number, since 1 + 2 + 2 + 80 + 577 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1228057695 and 1228057704.

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 127 ways as a sum of consecutive naturals, for example, 3292194 + ... + 3292566.

It is an arithmetic number, because the mean of its divisors is an integer number (12461680).

Almost surely, 2^1228057740 is an apocalyptic number.

1228057740 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 1228057740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2392642560).

1228057740 is an abundant number, since it is smaller than the sum of its proper divisors (3557227380).

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

1228057740 is a wasteful number, since it uses less digits than its factorization.

1228057740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 1228057740 is about 35043.6547751515. The cubic root of 1228057740 is about 1070.8770111970.

The spelling of 1228057740 in words is "one billion, two hundred twenty-eight million, fifty-seven thousand, seven hundred forty".