78022730 has 16 divisors (see below), whose sum is σ = 140761800. Its totient is φ = 31137792.

The previous prime is 78022729. The next prime is 78022781. The reversal of 78022730 is 3722087.

It can be written as a sum of positive squares in 4 ways, for example, as 47430769 + 30591961 = 6887^2 + 5531^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78022693 and 78022702.

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, 4199 + ... + 13178.

Almost surely, 2^78022730 is an apocalyptic number.

78022730 is a deficient number, since it is larger than the sum of its proper divisors (62739070).

78022730 is a wasteful number, since it uses less digits than its factorization.

78022730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17833.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 78022730 is about 8833.0476054417. The cubic root of 78022730 is about 427.3073673577.

The spelling of 78022730 in words is "seventy-eight million, twenty-two thousand, seven hundred thirty".