1228042620 has 120 divisors (see below), whose sum is σ = 4402800864. Its totient is φ = 280692864.

The previous prime is 1228042589. The next prime is 1228042661. The reversal of 1228042620 is 262408221.

It is a happy number.

1228042620 is a `hidden beast` number, since 12 + 28 + 0 + 4 + 2 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 42807 + ... + 65486.

Almost surely, 2^1228042620 is an apocalyptic number.

1228042620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228042620 is an abundant number, since it is smaller than the sum of its proper divisors (3174758244).

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

1228042620 is a wasteful number, since it uses less digits than its factorization.

1228042620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108321 (or 108310 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 1228042620 is about 35043.4390435642. The cubic root of 1228042620 is about 1070.8726162552.

The spelling of 1228042620 in words is "one billion, two hundred twenty-eight million, forty-two thousand, six hundred twenty".