78364280 has 32 divisors (see below), whose sum is σ = 182010240. Its totient is φ = 30334080.

The previous prime is 78364241. The next prime is 78364301. The reversal of 78364280 is 8246387.

It is a super-2 number, since 2×78364280² = 12281920759836800, 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 7 ways as a sum of consecutive naturals, for example, 30359 + ... + 32838.

It is an arithmetic number, because the mean of its divisors is an integer number (5687820).

Almost surely, 2^78364280 is an apocalyptic number.

It is an amenable number.

78364280 is an abundant number, since it is smaller than the sum of its proper divisors (103645960).

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

78364280 is a wasteful number, since it uses less digits than its factorization.

78364280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63239 (or 63235 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 78364280 is about 8852.3601372741. The cubic root of 78364280 is about 427.9299824322.

The spelling of 78364280 in words is "seventy-eight million, three hundred sixty-four thousand, two hundred eighty".