1916396544 has 88 divisors (see below), whose sum is σ = 5376895840. Its totient is φ = 605159424.

The previous prime is 1916396483. The next prime is 1916396549. The reversal of 1916396544 is 4456936191.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1916396493 and 1916396502.

It is not an unprimeable number, because it can be changed into a prime (1916396549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41952 + ... + 74784.

Almost surely, 2^1916396544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1916396544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2688447920).

1916396544 is an abundant number, since it is smaller than the sum of its proper divisors (3460499296).

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

1916396544 is a wasteful number, since it uses less digits than its factorization.

1916396544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32875 (or 32857 counting only the distinct ones).

The product of its digits is 699840, while the sum is 48.

The square root of 1916396544 is about 43776.6666615904. Note that the first 5 decimals coincide. The cubic root of 1916396544 is about 1242.1149615737.

The spelling of 1916396544 in words is "one billion, nine hundred sixteen million, three hundred ninety-six thousand, five hundred forty-four".