78042263 has 4 divisors (see below), whose sum is σ = 84045528. Its totient is φ = 72039000.

The previous prime is 78042259. The next prime is 78042301. The reversal of 78042263 is 36224087.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78042263 - 2² = 78042259 is a prime.

It is a super-2 number, since 2×78042263² = 12181189628322338, 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 (78042233) 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, 3001613 + ... + 3001638.

It is an arithmetic number, because the mean of its divisors is an integer number (21011382).

Almost surely, 2^78042263 is an apocalyptic number.

78042263 is a deficient number, since it is larger than the sum of its proper divisors (6003265).

78042263 is a wasteful number, since it uses less digits than its factorization.

78042263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6003264.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 78042263 is about 8834.1532135231. The cubic root of 78042263 is about 427.3430231996.

The spelling of 78042263 in words is "seventy-eight million, forty-two thousand, two hundred sixty-three".