78350320 has 20 divisors (see below), whose sum is σ = 182164680. Its totient is φ = 31340096.

The previous prime is 78350317. The next prime is 78350329. The reversal of 78350320 is 2305387.

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

It is a super-2 number, since 2×78350320² = 12277545288204800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78350329) 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, 489610 + ... + 489769.

It is an arithmetic number, because the mean of its divisors is an integer number (9108234).

Almost surely, 2^78350320 is an apocalyptic number.

It is an amenable number.

78350320 is an abundant number, since it is smaller than the sum of its proper divisors (103814360).

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

78350320 is a wasteful number, since it uses less digits than its factorization.

78350320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979392 (or 979386 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 78350320 is about 8851.5716118664. The cubic root of 78350320 is about 427.9045701001.

The spelling of 78350320 in words is "seventy-eight million, three hundred fifty thousand, three hundred twenty".