5431749840 has 280 divisors, whose sum is σ = 20658329568. Its totient is φ = 1316632320.

The previous prime is 5431749839. The next prime is 5431749901. The reversal of 5431749840 is 489471345.

5431749840 is a `hidden beast` number, since 543 + 17 + 4 + 98 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 637287 + ... + 645753.

Almost surely, 2^5431749840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5431749840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10329164784).

5431749840 is an abundant number, since it is smaller than the sum of its proper divisors (15226579728).

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

5431749840 is a wasteful number, since it uses less digits than its factorization.

5431749840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8509 (or 8488 counting only the distinct ones).

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

The square root of 5431749840 is about 73700.4059690311. The cubic root of 5431749840 is about 1757.8423369655.

The spelling of 5431749840 in words is "five billion, four hundred thirty-one million, seven hundred forty-nine thousand, eight hundred forty".