43479540 has 144 divisors (see below), whose sum is σ = 150525648. Its totient is φ = 10063872.

The previous prime is 43479539. The next prime is 43479547. The reversal of 43479540 is 4597434.

43479540 is a `hidden beast` number, since 43 + 4 + 79 + 540 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1954404 + 41525136 = 1398^2 + 6444^2 .

It is a super-2 number, since 2×43479540² = 3780940797223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 43479495 and 43479504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43479547) 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, 39234 + ... + 40326.

It is an arithmetic number, because the mean of its divisors is an integer number (1045317).

Almost surely, 2^43479540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43479540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75262824).

43479540 is an abundant number, since it is smaller than the sum of its proper divisors (107046108).

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

43479540 is a wasteful number, since it uses less digits than its factorization.

43479540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138 (or 1133 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 43479540 is about 6593.9017281121. The cubic root of 43479540 is about 351.6373352395.

The spelling of 43479540 in words is "forty-three million, four hundred seventy-nine thousand, five hundred forty".