78015430 has 16 divisors (see below), whose sum is σ = 141819984. Its totient is φ = 30896800.

The previous prime is 78015419. The next prime is 78015461. The reversal of 78015430 is 3451087.

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, 37612 + ... + 39631.

It is an arithmetic number, because the mean of its divisors is an integer number (8863749).

Almost surely, 2^78015430 is an apocalyptic number.

78015430 is a deficient number, since it is larger than the sum of its proper divisors (63804554).

78015430 is a wasteful number, since it uses less digits than its factorization.

78015430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77351.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 78015430 is about 8832.6343748623. The cubic root of 78015430 is about 427.2940402966.

It can be divided in two parts, 7801 and 5430, that added together give a palindrome (13231).

The spelling of 78015430 in words is "seventy-eight million, fifteen thousand, four hundred thirty".