1187428032 has 224 divisors, whose sum is σ = 4037990400. Its totient is φ = 335149056.

The previous prime is 1187428003. The next prime is 1187428037. The reversal of 1187428032 is 2308247811.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1187428037) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1075993 + ... + 1077095.

Almost surely, 2^1187428032 is an apocalyptic number.

1187428032 is a gapful number since it is divisible by the number (12) 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 1187428032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2018995200).

1187428032 is an abundant number, since it is smaller than the sum of its proper divisors (2850562368).

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

1187428032 is a wasteful number, since it uses less digits than its factorization.

1187428032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220 (or 1204 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 1187428032 is about 34459.0776429086. The cubic root of 1187428032 is about 1058.9345030876.

The spelling of 1187428032 in words is "one billion, one hundred eighty-seven million, four hundred twenty-eight thousand, thirty-two".