78265005 has 48 divisors (see below), whose sum is σ = 156893184. Its totient is φ = 33022080.

The previous prime is 78265003. The next prime is 78265007. The reversal of 78265005 is 50056287.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78265003) and next prime (78265007).

It is not a de Polignac number, because 78265005 - 2¹ = 78265003 is a prime.

It is a super-2 number, since 2×78265005² = 12250822015300050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78265003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5460 + ... + 13650.

It is an arithmetic number, because the mean of its divisors is an integer number (3268608).

Almost surely, 2^78265005 is an apocalyptic number.

It is an amenable number.

78265005 is an abundant number, since it is smaller than the sum of its proper divisors (78628179).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78265005 is a wasteful number, since it uses less digits than its factorization.

78265005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8226 (or 8219 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 78265005 is about 8846.7510985672. The cubic root of 78265005 is about 427.7491998050.

The spelling of 78265005 in words is "seventy-eight million, two hundred sixty-five thousand, five".