78140425 has 24 divisors (see below), whose sum is σ = 107305632. Its totient is φ = 55968000.

The previous prime is 78140423. The next prime is 78140431. The reversal of 78140425 is 52404187.

It is not a de Polignac number, because 78140425 - 2¹ = 78140423 is a prime.

It is a super-2 number, since 2×78140425² = 12211852038361250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78140423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16305 + ... + 20545.

It is an arithmetic number, because the mean of its divisors is an integer number (4471068).

Almost surely, 2^78140425 is an apocalyptic number.

It is an amenable number.

78140425 is a deficient number, since it is larger than the sum of its proper divisors (29165207).

78140425 is a wasteful number, since it uses less digits than its factorization.

78140425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329 (or 4324 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 78140425 is about 8839.7072915340. The cubic root of 78140425 is about 427.5221196220.

The spelling of 78140425 in words is "seventy-eight million, one hundred forty thousand, four hundred twenty-five".