43149640 has 32 divisors (see below), whose sum is σ = 99348480. Its totient is φ = 16857792.

The previous prime is 43149637. The next prime is 43149641. The reversal of 43149640 is 4694134.

It is not an unprimeable number, because it can be changed into a prime (43149641) 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, 10824 + ... + 14263.

It is an arithmetic number, because the mean of its divisors is an integer number (3104640).

Almost surely, 2^43149640 is an apocalyptic number.

43149640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43149640 is an abundant number, since it is smaller than the sum of its proper divisors (56198840).

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

43149640 is a wasteful number, since it uses less digits than its factorization.

43149640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25141 (or 25137 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 43149640 is about 6568.8385579187. The cubic root of 43149640 is about 350.7457297057.

The spelling of 43149640 in words is "forty-three million, one hundred forty-nine thousand, six hundred forty".