80435640 has 32 divisors (see below), whose sum is σ = 241307280. Its totient is φ = 21449472.

The previous prime is 80435633. The next prime is 80435651. The reversal of 80435640 is 4653408.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 80435598 and 80435607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335029 + ... + 335268.

Almost surely, 2^80435640 is an apocalyptic number.

It is an amenable number.

80435640 is an abundant number, since it is smaller than the sum of its proper divisors (160871640).

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

80435640 is a wasteful number, since it uses less digits than its factorization.

80435640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670311 (or 670307 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 80435640 is about 8968.5918627174. The cubic root of 80435640 is about 431.6676541936.

The spelling of 80435640 in words is "eighty million, four hundred thirty-five thousand, six hundred forty".