70778000 has 80 divisors (see below), whose sum is σ = 175334016. Its totient is φ = 27619200.

The previous prime is 70777997. The next prime is 70778011. The reversal of 70778000 is 87707.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85589 + ... + 86411.

Almost surely, 2^70778000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70778000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87667008).

70778000 is an abundant number, since it is smaller than the sum of its proper divisors (104556016).

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

70778000 is a wasteful number, since it uses less digits than its factorization.

70778000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889 (or 873 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 29.

The square root of 70778000 is about 8412.9661832198. The cubic root of 70778000 is about 413.6497461574.

The spelling of 70778000 in words is "seventy million, seven hundred seventy-eight thousand".