43157920 has 48 divisors (see below), whose sum is σ = 109809000. Its totient is φ = 15934464.

The previous prime is 43157899. The next prime is 43157923. The reversal of 43157920 is 2975134.

It can be written as a sum of positive squares in 4 ways, for example, as 13868176 + 29289744 = 3724^2 + 5412^2 .

It is not an unprimeable number, because it can be changed into a prime (43157923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8295 + ... + 12454.

Almost surely, 2^43157920 is an apocalyptic number.

43157920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43157920 is an abundant number, since it is smaller than the sum of its proper divisors (66651080).

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

43157920 is a wasteful number, since it uses less digits than its factorization.

43157920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20777 (or 20769 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 43157920 is about 6569.4687760884. The cubic root of 43157920 is about 350.7681631791.

The spelling of 43157920 in words is "forty-three million, one hundred fifty-seven thousand, nine hundred twenty".