1628617254 has 64 divisors (see below), whose sum is σ = 3622993920. Its totient is φ = 483945120.

The previous prime is 1628617213. The next prime is 1628617259. The reversal of 1628617254 is 4527168261.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628617259) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 726267 + ... + 728505.

It is an arithmetic number, because the mean of its divisors is an integer number (56609280).

Almost surely, 2^1628617254 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1628617254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1811496960).

1628617254 is an abundant number, since it is smaller than the sum of its proper divisors (1994376666).

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

1628617254 is a wasteful number, since it uses less digits than its factorization.

1628617254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465.

The product of its digits is 161280, while the sum is 42.

The square root of 1628617254 is about 40356.1303149844. The cubic root of 1628617254 is about 1176.5390435119.

The spelling of 1628617254 in words is "one billion, six hundred twenty-eight million, six hundred seventeen thousand, two hundred fifty-four".