1142735440 has 160 divisors (see below), whose sum is σ = 3383783424. Its totient is φ = 348510720.

The previous prime is 1142735389. The next prime is 1142735467. The reversal of 1142735440 is 445372411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 287547 + ... + 291493.

Almost surely, 2^1142735440 is an apocalyptic number.

1142735440 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 1142735440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1691891712).

1142735440 is an abundant number, since it is smaller than the sum of its proper divisors (2241047984).

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

1142735440 is a wasteful number, since it uses less digits than its factorization.

1142735440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4025 (or 4019 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 1142735440 is about 33804.3701316856. The cubic root of 1142735440 is about 1045.4788035020.

The spelling of 1142735440 in words is "one billion, one hundred forty-two million, seven hundred thirty-five thousand, four hundred forty".