78037130 has 16 divisors (see below), whose sum is σ = 140633064. Its totient is φ = 31177920.

The previous prime is 78037129. The next prime is 78037139. The reversal of 78037130 is 3173087.

It can be written as a sum of positive squares in 4 ways, for example, as 56535361 + 21501769 = 7519^2 + 4637^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78037093 and 78037102.

It is not an unprimeable number, because it can be changed into a prime (78037139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5264 + ... + 13556.

Almost surely, 2^78037130 is an apocalyptic number.

78037130 is a deficient number, since it is larger than the sum of its proper divisors (62595934).

78037130 is a wasteful number, since it uses less digits than its factorization.

78037130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9241.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 78037130 is about 8833.8626885412. The cubic root of 78037130 is about 427.3336539179. Note that the first 3 decimals are identical.

The spelling of 78037130 in words is "seventy-eight million, thirty-seven thousand, one hundred thirty".