80401780 has 24 divisors (see below), whose sum is σ = 169149960. Its totient is φ = 32102400.

The previous prime is 80401759. The next prime is 80401781. The reversal of 80401780 is 8710408.

It can be written as a sum of positive squares in 4 ways, for example, as 32764176 + 47637604 = 5724^2 + 6902^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80401781) 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, 8676 + ... + 15364.

It is an arithmetic number, because the mean of its divisors is an integer number (7047915).

Almost surely, 2^80401780 is an apocalyptic number.

It is an amenable number.

80401780 is an abundant number, since it is smaller than the sum of its proper divisors (88748180).

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

80401780 is a wasteful number, since it uses less digits than its factorization.

80401780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7299 (or 7297 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 80401780 is about 8966.7039652260. The cubic root of 80401780 is about 431.6070744216.

The spelling of 80401780 in words is "eighty million, four hundred one thousand, seven hundred eighty".