78250042 has 24 divisors (see below), whose sum is σ = 130554396. Its totient is φ = 35133696.

The previous prime is 78250013. The next prime is 78250057. The reversal of 78250042 is 24005287.

It can be written as a sum of positive squares in 6 ways, for example, as 52838361 + 25411681 = 7269^2 + 5041^2 .

It is a super-2 number, since 2×78250042² = 12246138146003528, which contains 22 as substring.

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, 9378 + ... + 15634.

Almost surely, 2^78250042 is an apocalyptic number.

78250042 is a deficient number, since it is larger than the sum of its proper divisors (52304354).

78250042 is a wasteful number, since it uses less digits than its factorization.

78250042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6322 (or 6309 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 78250042 is about 8845.9053804571. The cubic root of 78250042 is about 427.7219384971.

The spelling of 78250042 in words is "seventy-eight million, two hundred fifty thousand, forty-two".