80428261 has 8 divisors (see below), whose sum is σ = 81754904. Its totient is φ = 79107840.

The previous prime is 80428253. The next prime is 80428279. The reversal of 80428261 is 16282408.

It can be written as a sum of positive squares in 4 ways, for example, as 11222500 + 69205761 = 3350^2 + 8319^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 80428261 - 2³ = 80428253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80428661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29425 + ... + 32041.

It is an arithmetic number, because the mean of its divisors is an integer number (10219363).

Almost surely, 2^80428261 is an apocalyptic number.

It is an amenable number.

80428261 is a deficient number, since it is larger than the sum of its proper divisors (1326643).

80428261 is a wasteful number, since it uses less digits than its factorization.

80428261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3111.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 80428261 is about 8968.1804732064. The cubic root of 80428261 is about 431.6544536893.

The spelling of 80428261 in words is "eighty million, four hundred twenty-eight thousand, two hundred sixty-one".