40239673920 has 336 divisors, whose sum is σ = 144807017472. Its totient is φ = 10236948480.

The previous prime is 40239673843. The next prime is 40239673997. The reversal of 40239673920 is 2937693204.

40239673920 is a `hidden beast` number, since 402 + 3 + 96 + 73 + 92 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (40239673843) and next prime (40239673997).

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

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, 40604625 + ... + 40605615.

Almost surely, 2^40239673920 is an apocalyptic number.

40239673920 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 40239673920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72403508736).

40239673920 is an abundant number, since it is smaller than the sum of its proper divisors (104567343552).

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

40239673920 is a wasteful number, since it uses less digits than its factorization.

40239673920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650 (or 1637 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The spelling of 40239673920 in words is "forty billion, two hundred thirty-nine million, six hundred seventy-three thousand, nine hundred twenty".