78328525 has 12 divisors (see below), whose sum is σ = 105957504. Its totient is φ = 56966000.

The previous prime is 78328493. The next prime is 78328531. The reversal of 78328525 is 52582387.

It is not a de Polignac number, because 78328525 - 2⁵ = 78328493 is a prime.

It is a super-2 number, since 2×78328525² = 12270715657351250, 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 11 ways as a sum of consecutive naturals, for example, 142141 + ... + 142690.

It is an arithmetic number, because the mean of its divisors is an integer number (8829792).

Almost surely, 2^78328525 is an apocalyptic number.

It is an amenable number.

78328525 is a deficient number, since it is larger than the sum of its proper divisors (27628979).

78328525 is a wasteful number, since it uses less digits than its factorization.

78328525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284852 (or 284847 counting only the distinct ones).

The product of its digits is 134400, while the sum is 40.

The square root of 78328525 is about 8850.3403889342. The cubic root of 78328525 is about 427.8648891517.

The spelling of 78328525 in words is "seventy-eight million, three hundred twenty-eight thousand, five hundred twenty-five".