78231760 has 20 divisors (see below), whose sum is σ = 181889028. Its totient is φ = 31292672.

The previous prime is 78231709. The next prime is 78231779. The reversal of 78231760 is 6713287.

It can be written as a sum of positive squares in 2 ways, for example, as 39841344 + 38390416 = 6312^2 + 6196^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×78231760² = 12240416545395200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 488869 + ... + 489028.

Almost surely, 2^78231760 is an apocalyptic number.

It is an amenable number.

78231760 is an abundant number, since it is smaller than the sum of its proper divisors (103657268).

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

78231760 is a wasteful number, since it uses less digits than its factorization.

78231760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977910 (or 977904 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 78231760 is about 8844.8719606335. The cubic root of 78231760 is about 427.6886255371.

The spelling of 78231760 in words is "seventy-eight million, two hundred thirty-one thousand, seven hundred sixty".