80447690 has 8 divisors (see below), whose sum is σ = 144805860. Its totient is φ = 32179072.

The previous prime is 80447687. The next prime is 80447701. The reversal of 80447690 is 9674408.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67190809 + 13256881 = 8197^2 + 3641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×80447690² = 12943661652672200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4022375 + ... + 4022394.

Almost surely, 2^80447690 is an apocalyptic number.

80447690 is a deficient number, since it is larger than the sum of its proper divisors (64358170).

80447690 is a wasteful number, since it uses less digits than its factorization.

80447690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8044776.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 80447690 is about 8969.2636264077. The cubic root of 80447690 is about 431.6892090479.

The spelling of 80447690 in words is "eighty million, four hundred forty-seven thousand, six hundred ninety".