42950000640 has 136 divisors (see below), whose sum is σ = 137442099168. Its totient is φ = 11453071360.

The previous prime is 42950000609. The next prime is 42950000641. The reversal of 42950000640 is 4600005924.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 42950000598 and 42950000607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42950000641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961195 + ... + 1004885.

Almost surely, 2^42950000640 is an apocalyptic number.

42950000640 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 42950000640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68721049584).

42950000640 is an abundant number, since it is smaller than the sum of its proper divisors (94492098528).

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

42950000640 is an frugal number, since it uses more digits than its factorization.

42950000640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43731 (or 43701 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 42950000640 in words is "forty-two billion, nine hundred fifty million, six hundred forty", and thus it is an aban number.