43781407992 has 192 divisors, whose sum is σ = 137371852800. Its totient is φ = 12338645760.

The previous prime is 43781407933. The next prime is 43781408009. The reversal of 43781407992 is 29970418734.

43781407992 is a `hidden beast` number, since 437 + 81 + 40 + 7 + 9 + 92 = 666.

It is a super-2 number, since 2×43781407992² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11583559 + ... + 11587337.

It is an arithmetic number, because the mean of its divisors is an integer number (715478400).

Almost surely, 2^43781407992 is an apocalyptic number.

43781407992 is a gapful number since it is divisible by the number (42) 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 43781407992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68685926400).

43781407992 is an abundant number, since it is smaller than the sum of its proper divisors (93590444808).

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

43781407992 is a wasteful number, since it uses less digits than its factorization.

43781407992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4106 (or 4099 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 43781407992 in words is "forty-three billion, seven hundred eighty-one million, four hundred seven thousand, nine hundred ninety-two".