78255502 has 8 divisors (see below), whose sum is σ = 126412776. Its totient is φ = 36117912.

The previous prime is 78255491. The next prime is 78255503. The reversal of 78255502 is 20555287.

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

It is a super-2 number, since 2×78255502² = 12247847186544008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78255503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1504888 + ... + 1504939.

It is an arithmetic number, because the mean of its divisors is an integer number (15801597).

Almost surely, 2^78255502 is an apocalyptic number.

78255502 is a deficient number, since it is larger than the sum of its proper divisors (48157274).

78255502 is a wasteful number, since it uses less digits than its factorization.

78255502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009842.

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 78255502 is about 8846.2139924377. The cubic root of 78255502 is about 427.7318865533.

The spelling of 78255502 in words is "seventy-eight million, two hundred fifty-five thousand, five hundred two".