1187974440 has 96 divisors (see below), whose sum is σ = 3926426400. Its totient is φ = 311418240.

The previous prime is 1187974421. The next prime is 1187974457. The reversal of 1187974440 is 444797811.

It is a happy number.

1187974440 is a `hidden beast` number, since 118 + 7 + 97 + 4 + 440 = 666.

1187974440 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1187974440² = 2822566540186627200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6726 + ... + 49205.

It is an arithmetic number, because the mean of its divisors is an integer number (40900275).

Almost surely, 2^1187974440 is an apocalyptic number.

1187974440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1187974440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1963213200).

1187974440 is an abundant number, since it is smaller than the sum of its proper divisors (2738451960).

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

1187974440 is a wasteful number, since it uses less digits than its factorization.

1187974440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56007 (or 56000 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 1187974440 is about 34467.0050918266. The cubic root of 1187974440 is about 1059.0969049454.

The spelling of 1187974440 in words is "one billion, one hundred eighty-seven million, nine hundred seventy-four thousand, four hundred forty".