78233615 has 16 divisors (see below), whose sum is σ = 98979840. Its totient is φ = 59273760.

The previous prime is 78233591. The next prime is 78233647. The reversal of 78233615 is 51633287.

It is not a de Polignac number, because 78233615 - 2⁸ = 78233359 is a prime.

It is a super-2 number, since 2×78233615² = 12240997031936450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1916 + ... + 12654.

It is an arithmetic number, because the mean of its divisors is an integer number (6186240).

Almost surely, 2^78233615 is an apocalyptic number.

78233615 is a deficient number, since it is larger than the sum of its proper divisors (20746225).

78233615 is a wasteful number, since it uses less digits than its factorization.

78233615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10822.

The product of its digits is 30240, while the sum is 35.

The square root of 78233615 is about 8844.9768230335. The cubic root of 78233615 is about 427.6920059039.

The spelling of 78233615 in words is "seventy-eight million, two hundred thirty-three thousand, six hundred fifteen".