7900780 has 12 divisors (see below), whose sum is σ = 16591680. Its totient is φ = 3160304.

The previous prime is 7900769. The next prime is 7900787. The reversal of 7900780 is 870097.

It is not an unprimeable number, because it can be changed into a prime (7900787) 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, 197500 + ... + 197539.

It is an arithmetic number, because the mean of its divisors is an integer number (1382640).

Almost surely, 2^7900780 is an apocalyptic number.

It is an amenable number.

7900780 is an abundant number, since it is smaller than the sum of its proper divisors (8690900).

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

7900780 is a wasteful number, since it uses less digits than its factorization.

7900780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395048 (or 395046 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 7900780 is about 2810.8326168593. The cubic root of 7900780 is about 199.1697246505.

The spelling of 7900780 in words is "seven million, nine hundred thousand, seven hundred eighty".