1187728746 has 16 divisors (see below), whose sum is σ = 2397252000. Its totient is φ = 392277168.

The previous prime is 1187728723. The next prime is 1187728747. The reversal of 1187728746 is 6478277811.

It is not an unprimeable number, because it can be changed into a prime (1187728747) 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, 907396 + ... + 908703.

It is an arithmetic number, because the mean of its divisors is an integer number (149828250).

Almost surely, 2^1187728746 is an apocalyptic number.

1187728746 is an abundant number, since it is smaller than the sum of its proper divisors (1209523254).

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

1187728746 is a wasteful number, since it uses less digits than its factorization.

1187728746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816213.

The product of its digits is 1053696, while the sum is 51.

The square root of 1187728746 is about 34463.4407162140. The cubic root of 1187728746 is about 1059.0238866247.

The spelling of 1187728746 in words is "one billion, one hundred eighty-seven million, seven hundred twenty-eight thousand, seven hundred forty-six".