78233493 has 16 divisors (see below), whose sum is σ = 113097600. Its totient is φ = 47817024.

The previous prime is 78233471. The next prime is 78233497. The reversal of 78233493 is 39433287.

It is not a de Polignac number, because 78233493 - 2⁵ = 78233461 is a prime.

It is a super-2 number, since 2×78233493² = 12240958853962098, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78233497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 921 + ... + 12542.

It is an arithmetic number, because the mean of its divisors is an integer number (7068600).

Almost surely, 2^78233493 is an apocalyptic number.

It is an amenable number.

78233493 is a deficient number, since it is larger than the sum of its proper divisors (34864107).

78233493 is a wasteful number, since it uses less digits than its factorization.

78233493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13628.

The product of its digits is 108864, while the sum is 39.

The square root of 78233493 is about 8844.9699264610. The cubic root of 78233493 is about 427.6917835849.

The spelling of 78233493 in words is "seventy-eight million, two hundred thirty-three thousand, four hundred ninety-three".