78234455 has 8 divisors (see below), whose sum is σ = 101103072. Its totient is φ = 57773088.

The previous prime is 78234451. The next prime is 78234463. The reversal of 78234455 is 55443287.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78234455 - 2² = 78234451 is a prime.

It is a super-2 number, since 2×78234455² = 12241259898294050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78234451) 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, 601739 + ... + 601868.

It is an arithmetic number, because the mean of its divisors is an integer number (12637884).

Almost surely, 2^78234455 is an apocalyptic number.

78234455 is a deficient number, since it is larger than the sum of its proper divisors (22868617).

78234455 is a wasteful number, since it uses less digits than its factorization.

78234455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203625.

The product of its digits is 134400, while the sum is 38.

The square root of 78234455 is about 8845.0243074850. The cubic root of 78234455 is about 427.6935366185.

The spelling of 78234455 in words is "seventy-eight million, two hundred thirty-four thousand, four hundred fifty-five".