70806978 has 24 divisors (see below), whose sum is σ = 167362416. Its totient is φ = 21456600.

The previous prime is 70806973. The next prime is 70806979. The reversal of 70806978 is 87960807.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70806973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178608 + ... + 179003.

It is an arithmetic number, because the mean of its divisors is an integer number (6973434).

Almost surely, 2^70806978 is an apocalyptic number.

70806978 is an abundant number, since it is smaller than the sum of its proper divisors (96555438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70806978 is a wasteful number, since it uses less digits than its factorization.

70806978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357630 (or 357627 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 70806978 is about 8414.6882295187. The cubic root of 70806978 is about 413.7061907534.

The spelling of 70806978 in words is "seventy million, eight hundred six thousand, nine hundred seventy-eight".