40494712320 has 400 divisors, whose sum is σ = 145699522848. Its totient is φ = 10749542400.

The previous prime is 40494712309. The next prime is 40494712327. The reversal of 40494712320 is 2321749404.

40494712320 is a `hidden beast` number, since 40 + 494 + 7 + 123 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40494712327) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 83151117 + ... + 83151603.

Almost surely, 2^40494712320 is an apocalyptic number.

40494712320 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 40494712320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72849761424).

40494712320 is an abundant number, since it is smaller than the sum of its proper divisors (105204810528).

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

40494712320 is an equidigital number, since it uses as much as digits as its factorization.

40494712320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 40494712320 in words is "forty billion, four hundred ninety-four million, seven hundred twelve thousand, three hundred twenty".