78250275 has 18 divisors (see below), whose sum is σ = 140155340. Its totient is φ = 41733360.

The previous prime is 78250261. The next prime is 78250279. The reversal of 78250275 is 57205287.

78250275 is a `hidden beast` number, since 7 + 82 + 502 + 75 = 666.

It is not a de Polignac number, because 78250275 - 2⁷ = 78250147 is a prime.

It is a super-2 number, since 2×78250275² = 12246211075151250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78250279) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 173665 + ... + 174114.

Almost surely, 2^78250275 is an apocalyptic number.

78250275 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78250275 is a deficient number, since it is larger than the sum of its proper divisors (61905065).

78250275 is a wasteful number, since it uses less digits than its factorization.

78250275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347795 (or 347787 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 78250275 is about 8845.9185503824. The cubic root of 78250275 is about 427.7223630298.

The spelling of 78250275 in words is "seventy-eight million, two hundred fifty thousand, two hundred seventy-five".