43680906 has 12 divisors (see below), whose sum is σ = 94642002. Its totient is φ = 14560296.

The previous prime is 43680899. The next prime is 43680913. The reversal of 43680906 is 60908634.

It is an interprime number because it is at equal distance from previous prime (43680899) and next prime (43680913).

It can be written as a sum of positive squares in only one way, i.e., 43678881 + 2025 = 6609^2 + 45^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1213341 + ... + 1213376.

Almost surely, 2^43680906 is an apocalyptic number.

43680906 is an abundant number, since it is smaller than the sum of its proper divisors (50961096).

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

43680906 is a wasteful number, since it uses less digits than its factorization.

43680906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426725 (or 2426722 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 43680906 is about 6609.1531984060. The cubic root of 43680906 is about 352.1793432255.

The spelling of 43680906 in words is "forty-three million, six hundred eighty thousand, nine hundred six".