1149192820 has 24 divisors (see below), whose sum is σ = 2415206304. Its totient is φ = 459314976.

The previous prime is 1149192797. The next prime is 1149192823. The reversal of 1149192820 is 282919411.

It is a self number, because there is not a number n which added to its sum of digits gives 1149192820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149192823) 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, 4159 + ... + 48121.

It is an arithmetic number, because the mean of its divisors is an integer number (100633596).

Almost surely, 2^1149192820 is an apocalyptic number.

1149192820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1149192820 is an abundant number, since it is smaller than the sum of its proper divisors (1266013484).

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

1149192820 is a wasteful number, since it uses less digits than its factorization.

1149192820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45279 (or 45277 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 1149192820 is about 33899.7466067226. The cubic root of 1149192820 is about 1047.4443728850. Note that the first 3 decimals are identical.

The spelling of 1149192820 in words is "one billion, one hundred forty-nine million, one hundred ninety-two thousand, eight hundred twenty".