1143867654 has 48 divisors (see below), whose sum is σ = 2576154672. Its totient is φ = 366496704.

The previous prime is 1143867653. The next prime is 1143867701. The reversal of 1143867654 is 4567683411.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143867653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44932 + ... + 65624.

It is an arithmetic number, because the mean of its divisors is an integer number (53669889).

Almost surely, 2^1143867654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143867654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1288077336).

1143867654 is an abundant number, since it is smaller than the sum of its proper divisors (1432287018).

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

1143867654 is a wasteful number, since it uses less digits than its factorization.

1143867654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20821 (or 20818 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 1143867654 is about 33821.1125482294. The cubic root of 1143867654 is about 1045.8239738059.

The spelling of 1143867654 in words is "one billion, one hundred forty-three million, eight hundred sixty-seven thousand, six hundred fifty-four".