70781960 has 32 divisors (see below), whose sum is σ = 161875800. Its totient is φ = 27847680.

The previous prime is 70781951. The next prime is 70781983. The reversal of 70781960 is 6918707.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22033636 + 48748324 = 4694^2 + 6982^2 .

It is a super-2 number, since 2×70781960² = 10020171722883200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12065 + ... + 16944.

Almost surely, 2^70781960 is an apocalyptic number.

It is an amenable number.

70781960 is an abundant number, since it is smaller than the sum of its proper divisors (91093840).

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

70781960 is a wasteful number, since it uses less digits than its factorization.

70781960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29081 (or 29077 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 70781960 is about 8413.2015309275. The cubic root of 70781960 is about 413.6574605246.

The spelling of 70781960 in words is "seventy million, seven hundred eighty-one thousand, nine hundred sixty".