1145949636 has 96 divisors (see below), whose sum is σ = 2929707648. Its totient is φ = 346521600.

The previous prime is 1145949619. The next prime is 1145949643. The reversal of 1145949636 is 6369495411.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4049151 + ... + 4049433.

It is an arithmetic number, because the mean of its divisors is an integer number (30517788).

Almost surely, 2^1145949636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1145949636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1464853824).

1145949636 is an abundant number, since it is smaller than the sum of its proper divisors (1783758012).

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

1145949636 is a wasteful number, since it uses less digits than its factorization.

1145949636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661 (or 659 counting only the distinct ones).

The product of its digits is 699840, while the sum is 48.

The square root of 1145949636 is about 33851.8778799641. The cubic root of 1145949636 is about 1046.4580993176.

The spelling of 1145949636 in words is "one billion, one hundred forty-five million, nine hundred forty-nine thousand, six hundred thirty-six".