77348220 has 48 divisors (see below), whose sum is σ = 224048160. Its totient is φ = 19914496.

The previous prime is 77348213. The next prime is 77348239. The reversal of 77348220 is 2284377.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20487 + ... + 23966.

It is an arithmetic number, because the mean of its divisors is an integer number (4667670).

Almost surely, 2^77348220 is an apocalyptic number.

It is an amenable number.

77348220 is an abundant number, since it is smaller than the sum of its proper divisors (146699940).

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

77348220 is a wasteful number, since it uses less digits than its factorization.

77348220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44494 (or 44492 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 77348220 is about 8794.7836812511. The cubic root of 77348220 is about 426.0724380333.

The spelling of 77348220 in words is "seventy-seven million, three hundred forty-eight thousand, two hundred twenty".