43897870512 has 40 divisors (see below), whose sum is σ = 126003148080. Its totient is φ = 14632623360.

The previous prime is 43897870501. The next prime is 43897870531. The reversal of 43897870512 is 21507879834.

It is a happy number.

43897870512 is a `hidden beast` number, since 4 + 38 + 97 + 8 + 7 + 0 + 512 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50807289 + ... + 50808152.

It is an arithmetic number, because the mean of its divisors is an integer number (3150078702).

Almost surely, 2^43897870512 is an apocalyptic number.

It is an amenable number.

43897870512 is an abundant number, since it is smaller than the sum of its proper divisors (82105277568).

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

43897870512 is a wasteful number, since it uses less digits than its factorization.

43897870512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101615458 (or 101615446 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 43897870512 in words is "forty-three billion, eight hundred ninety-seven million, eight hundred seventy thousand, five hundred twelve".