43720270587 has 48 divisors (see below), whose sum is σ = 78785557760. Its totient is φ = 23668098912.

The previous prime is 43720270519. The next prime is 43720270637. The reversal of 43720270587 is 78507202734.

43720270587 is a `hidden beast` number, since 4 + 372 + 0 + 270 + 5 + 8 + 7 = 666.

It is not a de Polignac number, because 43720270587 - 2¹⁰ = 43720269563 is a prime.

It is a super-2 number, since 2×43720270587² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43720270987) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 644068 + ... + 708705.

Almost surely, 2^43720270587 is an apocalyptic number.

43720270587 is a deficient number, since it is larger than the sum of its proper divisors (35065287173).

43720270587 is a wasteful number, since it uses less digits than its factorization.

43720270587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352814 (or 1352802 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 45.

The spelling of 43720270587 in words is "forty-three billion, seven hundred twenty million, two hundred seventy thousand, five hundred eighty-seven".