80687428 has 6 divisors (see below), whose sum is σ = 141203006. Its totient is φ = 40343712.

The previous prime is 80687401. The next prime is 80687429. The reversal of 80687428 is 82478608.

It can be written as a sum of positive squares in only one way, i.e., 80604484 + 82944 = 8978^2 + 288^2 .

It is a super-2 number, since 2×80687428² = 13020922074510368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80687429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10085925 + ... + 10085932.

Almost surely, 2^80687428 is an apocalyptic number.

It is an amenable number.

80687428 is a deficient number, since it is larger than the sum of its proper divisors (60515578).

80687428 is a wasteful number, since it uses less digits than its factorization.

80687428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20171861 (or 20171859 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 80687428 is about 8982.6181038715. The cubic root of 80687428 is about 432.1176020133.

The spelling of 80687428 in words is "eighty million, six hundred eighty-seven thousand, four hundred twenty-eight".