1243193040 has 120 divisors (see below), whose sum is σ = 4237535328. Its totient is φ = 326557440.

The previous prime is 1243193023. The next prime is 1243193057. The reversal of 1243193040 is 403913421.

It is an interprime number because it is at equal distance from previous prime (1243193023) and next prime (1243193057).

It is a tau number, because it is divible by the number of its divisors (120).

It is a junction number, because it is equal to n+sod(n) for n = 1243192995 and 1243193013.

It is a congruent number.

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, 35355 + ... + 61125.

Almost surely, 2^1243193040 is an apocalyptic number.

1243193040 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 1243193040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2118767664).

1243193040 is an abundant number, since it is smaller than the sum of its proper divisors (2994342288).

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

1243193040 is a wasteful number, since it uses less digits than its factorization.

1243193040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25857 (or 25848 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1243193040 is about 35258.9426954354. The cubic root of 1243193040 is about 1075.2584314679.

The spelling of 1243193040 in words is "one billion, two hundred forty-three million, one hundred ninety-three thousand, forty".