43157440 has 28 divisors (see below), whose sum is σ = 102769416. Its totient is φ = 17262848.

The previous prime is 43157399. The next prime is 43157449. The reversal of 43157440 is 4475134.

It is a junction number, because it is equal to n+sod(n) for n = 43157399 and 43157408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43157449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67114 + ... + 67753.

Almost surely, 2^43157440 is an apocalyptic number.

43157440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43157440 is an abundant number, since it is smaller than the sum of its proper divisors (59611976).

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

43157440 is a wasteful number, since it uses less digits than its factorization.

43157440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134884 (or 134874 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 43157440 is about 6569.4322433525. The cubic root of 43157440 is about 350.7668627663.

The spelling of 43157440 in words is "forty-three million, one hundred fifty-seven thousand, four hundred forty".