1618678372 has 12 divisors (see below), whose sum is σ = 2860189696. Its totient is φ = 801481320.

The previous prime is 1618678349. The next prime is 1618678379. The reversal of 1618678372 is 2738768161.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1618678379) 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 3 ways as a sum of consecutive naturals, for example, 1964004 + ... + 1964827.

Almost surely, 2^1618678372 is an apocalyptic number.

It is an amenable number.

1618678372 is a deficient number, since it is larger than the sum of its proper divisors (1241511324).

1618678372 is a wasteful number, since it uses less digits than its factorization.

1618678372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3928938 (or 3928936 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The square root of 1618678372 is about 40232.8021892585. The cubic root of 1618678372 is about 1174.1408228231.

The spelling of 1618678372 in words is "one billion, six hundred eighteen million, six hundred seventy-eight thousand, three hundred seventy-two".