1628742136 has 32 divisors (see below), whose sum is σ = 3564426240. Its totient is φ = 683179488.

The previous prime is 1628742133. The next prime is 1628742197. The reversal of 1628742136 is 6312478261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628742133) 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 7 ways as a sum of consecutive naturals, for example, 306780 + ... + 312043.

It is an arithmetic number, because the mean of its divisors is an integer number (111388320).

Almost surely, 2^1628742136 is an apocalyptic number.

It is an amenable number.

1628742136 is an abundant number, since it is smaller than the sum of its proper divisors (1935684104).

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

1628742136 is a wasteful number, since it uses less digits than its factorization.

1628742136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618883 (or 618879 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 1628742136 is about 40357.6775347641. The cubic root of 1628742136 is about 1176.5691149919.

The spelling of 1628742136 in words is "one billion, six hundred twenty-eight million, seven hundred forty-two thousand, one hundred thirty-six".