1142669840 has 120 divisors (see below), whose sum is σ = 2897314560. Its totient is φ = 418908672.

The previous prime is 1142669761. The next prime is 1142669893. The reversal of 1142669840 is 489662411.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3014771 + ... + 3015149.

It is an arithmetic number, because the mean of its divisors is an integer number (24144288).

Almost surely, 2^1142669840 is an apocalyptic number.

1142669840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142669840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448657280).

1142669840 is an abundant number, since it is smaller than the sum of its proper divisors (1754644720).

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

1142669840 is a wasteful number, since it uses less digits than its factorization.

1142669840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 622 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 1142669840 is about 33803.3998290113. The cubic root of 1142669840 is about 1045.4587974943.

The spelling of 1142669840 in words is "one billion, one hundred forty-two million, six hundred sixty-nine thousand, eight hundred forty".