1142800656 has 80 divisors (see below), whose sum is σ = 3156476544. Its totient is φ = 355018752.

The previous prime is 1142800621. The next prime is 1142800663. The reversal of 1142800656 is 6560082411.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77250 + ... + 90846.

Almost surely, 2^1142800656 is an apocalyptic number.

1142800656 is a gapful number since it is divisible by the number (16) 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 1142800656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1578238272).

1142800656 is an abundant number, since it is smaller than the sum of its proper divisors (2013675888).

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

1142800656 is a wasteful number, since it uses less digits than its factorization.

1142800656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13728 (or 13722 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 1142800656 is about 33805.3347269333. The cubic root of 1142800656 is about 1045.4986916424.

The spelling of 1142800656 in words is "one billion, one hundred forty-two million, eight hundred thousand, six hundred fifty-six".