1612278889 has 8 divisors (see below), whose sum is σ = 1752528960. Its totient is φ = 1474347216.

The previous prime is 1612278887. The next prime is 1612278919. The reversal of 1612278889 is 9888722161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1612278889 - 2¹ = 1612278887 is a prime.

It is a super-4 number, since 4×1612278889⁴ (a number of 38 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1612278881) 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, 578149 + ... + 580930.

It is an arithmetic number, because the mean of its divisors is an integer number (219066120).

Almost surely, 2^1612278889 is an apocalyptic number.

It is an amenable number.

1612278889 is a deficient number, since it is larger than the sum of its proper divisors (140250071).

1612278889 is a wasteful number, since it uses less digits than its factorization.

1612278889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159199.

The product of its digits is 774144, while the sum is 52.

The square root of 1612278889 is about 40153.1927622200. The cubic root of 1612278889 is about 1172.5914480799.

The spelling of 1612278889 in words is "one billion, six hundred twelve million, two hundred seventy-eight thousand, eight hundred eighty-nine".