747980 has 24 divisors (see below), whose sum is σ = 1587600. Its totient is φ = 296000.

The previous prime is 747979. The next prime is 747991. The reversal of 747980 is 89747.

747980 = T₁₆ + T₁₇ + ... + T₁₆₄.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 747980.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2855 + ... + 3105.

It is an arithmetic number, because the mean of its divisors is an integer number (66150).

2⁷⁴⁷⁹⁸⁰ is an apocalyptic number.

It is an amenable number.

747980 is an abundant number, since it is smaller than the sum of its proper divisors (839620).

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

747980 is a wasteful number, since it uses less digits than its factorization.

747980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 747980 is about 864.8583699080. The cubic root of 747980 is about 90.7743877770.

The spelling of 747980 in words is "seven hundred forty-seven thousand, nine hundred eighty".