43638347420740 has 48 divisors (see below), whose sum is σ = 93012225364800. Its totient is φ = 17194085580672.

The previous prime is 43638347420737. The next prime is 43638347420741. The reversal of 43638347420740 is 4702474383634.

It is a happy number.

It is a super-2 number, since 2×43638347420740² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43638347420741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31630671 + ... + 32981449.

It is an arithmetic number, because the mean of its divisors is an integer number (1937754695100).

Almost surely, 2^{43638347420740} is an apocalyptic number.

It is an amenable number.

43638347420740 is an abundant number, since it is smaller than the sum of its proper divisors (49373877944060).

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

43638347420740 is a wasteful number, since it uses less digits than its factorization.

43638347420740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374964 (or 1374962 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 55.

The spelling of 43638347420740 in words is "forty-three trillion, six hundred thirty-eight billion, three hundred forty-seven million, four hundred twenty thousand, seven hundred forty".