1187276420 has 24 divisors (see below), whose sum is σ = 2719942848. Its totient is φ = 431736800.

The previous prime is 1187276407. The next prime is 1187276473. The reversal of 1187276420 is 246727811.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2698136 + ... + 2698575.

It is an arithmetic number, because the mean of its divisors is an integer number (113330952).

Almost surely, 2^1187276420 is an apocalyptic number.

1187276420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1187276420 is an abundant number, since it is smaller than the sum of its proper divisors (1532666428).

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

1187276420 is a wasteful number, since it uses less digits than its factorization.

1187276420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5396731 (or 5396729 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 1187276420 is about 34456.8776879159. The cubic root of 1187276420 is about 1058.8894325634.

The spelling of 1187276420 in words is "one billion, one hundred eighty-seven million, two hundred seventy-six thousand, four hundred twenty".