78037265 has 4 divisors (see below), whose sum is σ = 93644724. Its totient is φ = 62429808.

The previous prime is 78037207. The next prime is 78037283. The reversal of 78037265 is 56273087.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29149201 + 48888064 = 5399^2 + 6992^2 .

It is a cyclic number.

It is not a de Polignac number, because 78037265 - 2¹⁰ = 78036241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7803722 + ... + 7803731.

It is an arithmetic number, because the mean of its divisors is an integer number (23411181).

Almost surely, 2^78037265 is an apocalyptic number.

It is an amenable number.

78037265 is a deficient number, since it is larger than the sum of its proper divisors (15607459).

78037265 is a wasteful number, since it uses less digits than its factorization.

78037265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15607458.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 78037265 is about 8833.8703295894. The cubic root of 78037265 is about 427.3339003391. Note that the first 3 decimals are identical.

The spelling of 78037265 in words is "seventy-eight million, thirty-seven thousand, two hundred sixty-five".