1612728290 has 32 divisors (see below), whose sum is σ = 3076256880. Its totient is φ = 606633984.

The previous prime is 1612728277. The next prime is 1612728301. The reversal of 1612728290 is 928272161.

It can be written as a sum of positive squares in 8 ways, for example, as 1040514049 + 572214241 = 32257^2 + 23921^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243746 + ... + 250274.

Almost surely, 2^1612728290 is an apocalyptic number.

1612728290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1612728290 is a deficient number, since it is larger than the sum of its proper divisors (1463528590).

1612728290 is a wasteful number, since it uses less digits than its factorization.

1612728290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8006.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1612728290 is about 40158.7884528406. The cubic root of 1612728290 is about 1172.7003859771.

The spelling of 1612728290 in words is "one billion, six hundred twelve million, seven hundred twenty-eight thousand, two hundred ninety".