78942250 has 32 divisors (see below), whose sum is σ = 148376592. Its totient is φ = 31449600.

The previous prime is 78942239. The next prime is 78942257. The reversal of 78942250 is 5224987.

It can be written as a sum of positive squares in 8 ways, for example, as 3651921 + 75290329 = 1911^2 + 8677^2 .

It is not an unprimeable number, because it can be changed into a prime (78942257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83782 + ... + 84718.

Almost surely, 2^78942250 is an apocalyptic number.

78942250 is a deficient number, since it is larger than the sum of its proper divisors (69434342).

78942250 is a wasteful number, since it uses less digits than its factorization.

78942250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291 (or 1281 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 78942250 is about 8884.9451320759. The cubic root of 78942250 is about 428.9794619263.

The spelling of 78942250 in words is "seventy-eight million, nine hundred forty-two thousand, two hundred fifty".