70778880 has 160 divisors (see below), whose sum is σ = 251658000. Its totient is φ = 18874368.

The previous prime is 70778861. The next prime is 70778893. The reversal of 70778880 is 8887707.

It is a Jordan-Polya number, since it can be written as 6! ⋅ 4! ⋅ (2!)¹².

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14155774 + ... + 14155778.

Almost surely, 2^70778880 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 70778880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125829000).

70778880 is an abundant number, since it is smaller than the sum of its proper divisors (180879120).

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

70778880 is an frugal number, since it uses more digits than its factorization.

70778880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 45.

The square root of 70778880 is about 8413.0184832794. The cubic root of 70778880 is about 413.6514604861.

The spelling of 70778880 in words is "seventy million, seven hundred seventy-eight thousand, eight hundred eighty".