1187616444 has 24 divisors (see below), whose sum is σ = 3166977408. Its totient is φ = 339318960.

The previous prime is 1187616407. The next prime is 1187616449. The reversal of 1187616444 is 4446167811.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1187616396 and 1187616405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187616449) 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, 7069062 + ... + 7069229.

It is an arithmetic number, because the mean of its divisors is an integer number (131957392).

Almost surely, 2^1187616444 is an apocalyptic number.

1187616444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1187616444 is an abundant number, since it is smaller than the sum of its proper divisors (1979360964).

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

1187616444 is a wasteful number, since it uses less digits than its factorization.

1187616444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14138305 (or 14138303 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 1187616444 is about 34461.8113859385. The cubic root of 1187616444 is about 1058.9905080020.

The spelling of 1187616444 in words is "one billion, one hundred eighty-seven million, six hundred sixteen thousand, four hundred forty-four".