1140221380 has 48 divisors (see below), whose sum is σ = 2420155584. Its totient is φ = 451218560.

The previous prime is 1140221371. The next prime is 1140221387. The reversal of 1140221380 is 831220411.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1140221387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1474674 + ... + 1475446.

It is an arithmetic number, because the mean of its divisors is an integer number (50419908).

Almost surely, 2^1140221380 is an apocalyptic number.

1140221380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1140221380 is an abundant number, since it is smaller than the sum of its proper divisors (1279934204).

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

1140221380 is a wasteful number, since it uses less digits than its factorization.

1140221380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476 (or 1474 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1140221380 is about 33767.1642279893. The cubic root of 1140221380 is about 1044.7115432855.

Adding to 1140221380 its reverse (831220411), we get a palindrome (1971441791).

The spelling of 1140221380 in words is "one billion, one hundred forty million, two hundred twenty-one thousand, three hundred eighty".