80252778 has 16 divisors (see below), whose sum is σ = 164844000. Its totient is φ = 26027856.

The previous prime is 80252771. The next prime is 80252839. The reversal of 80252778 is 87725208.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80252771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180528 + ... + 180971.

It is an arithmetic number, because the mean of its divisors is an integer number (10302750).

Almost surely, 2^80252778 is an apocalyptic number.

80252778 is an abundant number, since it is smaller than the sum of its proper divisors (84591222).

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

80252778 is a wasteful number, since it uses less digits than its factorization.

80252778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361541.

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 80252778 is about 8958.3914850826. The cubic root of 80252778 is about 431.3402889298.

The spelling of 80252778 in words is "eighty million, two hundred fifty-two thousand, seven hundred seventy-eight".