80020690 has 8 divisors (see below), whose sum is σ = 144037260. Its totient is φ = 32008272.

The previous prime is 80020687. The next prime is 80020691. The reversal of 80020690 is 9602008.

It can be written as a sum of positive squares in 2 ways, for example, as 79441569 + 579121 = 8913^2 + 761^2 .

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

It is a super-2 number, since 2×80020690² = 12806621656152200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80020691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4001025 + ... + 4001044.

Almost surely, 2^80020690 is an apocalyptic number.

80020690 is a deficient number, since it is larger than the sum of its proper divisors (64016570).

80020690 is a wasteful number, since it uses less digits than its factorization.

80020690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8002076.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 80020690 is about 8945.4284413884. The cubic root of 80020690 is about 430.9240808493.

Adding to 80020690 its reverse (9602008), we get a palindrome (89622698).

The spelling of 80020690 in words is "eighty million, twenty thousand, six hundred ninety".