78290403 has 8 divisors (see below), whose sum is σ = 105401088. Its totient is φ = 51686664.

The previous prime is 78290347. The next prime is 78290419. The reversal of 78290403 is 30409287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78290403 - 2⁶ = 78290339 is a prime.

It is a super-2 number, since 2×78290403² = 12258774403804818, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (78290473) 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, 126375 + ... + 126992.

It is an arithmetic number, because the mean of its divisors is an integer number (13175136).

Almost surely, 2^78290403 is an apocalyptic number.

78290403 is a deficient number, since it is larger than the sum of its proper divisors (27110685).

78290403 is a wasteful number, since it uses less digits than its factorization.

78290403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253473.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 78290403 is about 8848.1864243471. The cubic root of 78290403 is about 427.7954648384.

The spelling of 78290403 in words is "seventy-eight million, two hundred ninety thousand, four hundred three".