70778128 has 20 divisors (see below), whose sum is σ = 137295900. Its totient is φ = 35346944.

The previous prime is 70778101. The next prime is 70778143. The reversal of 70778128 is 82187707.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 63552784 + 7225344 = 7972^2 + 2688^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14676 + ... + 18892.

It is an arithmetic number, because the mean of its divisors is an integer number (6864795).

Almost surely, 2^70778128 is an apocalyptic number.

It is an amenable number.

70778128 is a deficient number, since it is larger than the sum of its proper divisors (66517772).

70778128 is a wasteful number, since it uses less digits than its factorization.

70778128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5274 (or 5268 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 40.

The square root of 70778128 is about 8412.9737905214. The cubic root of 70778128 is about 413.6499955152.

The spelling of 70778128 in words is "seventy million, seven hundred seventy-eight thousand, one hundred twenty-eight".