1628774568 has 48 divisors (see below), whose sum is σ = 4574650080. Its totient is φ = 542924208.

The previous prime is 1628774561. The next prime is 1628774593. The reversal of 1628774568 is 8654778261.

1628774568 is a `hidden beast` number, since 1 + 6 + 2 + 8 + 7 + 74 + 568 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1628774561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 416980 + ... + 420867.

It is an arithmetic number, because the mean of its divisors is an integer number (95305210).

Almost surely, 2^1628774568 is an apocalyptic number.

1628774568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1628774568 is an abundant number, since it is smaller than the sum of its proper divisors (2945875512).

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

1628774568 is an equidigital number, since it uses as much as digits as its factorization.

1628774568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837868 (or 837852 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The square root of 1628774568 is about 40358.0793398298. The cubic root of 1628774568 is about 1176.5769243386.

The spelling of 1628774568 in words is "one billion, six hundred twenty-eight million, seven hundred seventy-four thousand, five hundred sixty-eight".