1149881640 has 64 divisors (see below), whose sum is σ = 3514752000. Its totient is φ = 300847872.

The previous prime is 1149881633. The next prime is 1149881647. The reversal of 1149881640 is 461889411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1149881633) and next prime (1149881647).

It is a junction number, because it is equal to n+sod(n) for n = 1149881592 and 1149881601.

It is not an unprimeable number, because it can be changed into a prime (1149881647) 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, 84040 + ... + 96759.

It is an arithmetic number, because the mean of its divisors is an integer number (54918000).

Almost surely, 2^1149881640 is an apocalyptic number.

1149881640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1149881640 is an abundant number, since it is smaller than the sum of its proper divisors (2364870360).

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

1149881640 is a wasteful number, since it uses less digits than its factorization.

1149881640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180866 (or 180862 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 1149881640 is about 33909.9047477282. The cubic root of 1149881640 is about 1047.6536085948.

The spelling of 1149881640 in words is "one billion, one hundred forty-nine million, eight hundred eighty-one thousand, six hundred forty".