78232765 has 8 divisors (see below), whose sum is σ = 101100888. Its totient is φ = 57771840.

The previous prime is 78232753. The next prime is 78232783. The reversal of 78232765 is 56723287.

It can be written as a sum of positive squares in 4 ways, for example, as 3392964 + 74839801 = 1842^2 + 8651^2 .

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

It is not a de Polignac number, because 78232765 - 2⁵ = 78232733 is a prime.

It is a super-2 number, since 2×78232765² = 12240731039090450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601726 + ... + 601855.

It is an arithmetic number, because the mean of its divisors is an integer number (12637611).

Almost surely, 2^78232765 is an apocalyptic number.

It is an amenable number.

78232765 is a deficient number, since it is larger than the sum of its proper divisors (22868123).

78232765 is a wasteful number, since it uses less digits than its factorization.

78232765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203599.

The product of its digits is 141120, while the sum is 40.

The square root of 78232765 is about 8844.9287730315. The cubic root of 78232765 is about 427.6904569554.

The spelling of 78232765 in words is "seventy-eight million, two hundred thirty-two thousand, seven hundred sixty-five".