4293544640 has 504 divisors, whose sum is σ = 13679277696. Its totient is φ = 1277337600.

The previous prime is 4293544631. The next prime is 4293544649. The reversal of 4293544640 is 464453924.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4293544631) and next prime (4293544649).

It is not an unprimeable number, because it can be changed into a prime (4293544649) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 58815644 + ... + 58815716.

It is an arithmetic number, because the mean of its divisors is an integer number (27141424).

Almost surely, 2^4293544640 is an apocalyptic number.

4293544640 is a gapful number since it is divisible by the number (40) 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 4293544640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6839638848).

4293544640 is an abundant number, since it is smaller than the sum of its proper divisors (9385733056).

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

4293544640 is a wasteful number, since it uses less digits than its factorization.

4293544640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 41.

The square root of 4293544640 is about 65525.1450971305. The cubic root of 4293544640 is about 1625.3191817994.

The spelling of 4293544640 in words is "four billion, two hundred ninety-three million, five hundred forty-four thousand, six hundred forty".