43912970640 has 1600 divisors, whose sum is σ = 209074618368. Its totient is φ = 8261222400.

The previous prime is 43912970603. The next prime is 43912970641. The reversal of 43912970640 is 4607921934.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (43912970641) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 262951837 + ... + 262952003.

Almost surely, 2^43912970640 is an apocalyptic number.

43912970640 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 43912970640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104537309184).

43912970640 is an abundant number, since it is smaller than the sum of its proper divisors (165161647728).

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

43912970640 is a wasteful number, since it uses less digits than its factorization.

43912970640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 43912970640 in words is "forty-three billion, nine hundred twelve million, nine hundred seventy thousand, six hundred forty".