70161870 has 32 divisors (see below), whose sum is σ = 177252480. Its totient is φ = 17724960.

The previous prime is 70161829. The next prime is 70161899. The reversal of 70161870 is 7816107.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

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, 60976 + ... + 62115.

It is an arithmetic number, because the mean of its divisors is an integer number (5539140).

Almost surely, 2^70161870 is an apocalyptic number.

70161870 is an abundant number, since it is smaller than the sum of its proper divisors (107090610).

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

70161870 is a wasteful number, since it uses less digits than its factorization.

70161870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123120.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 70161870 is about 8376.2682621798. The cubic root of 70161870 is about 412.4459580258.

Adding to 70161870 its reverse (7816107), we get a palindrome (77977977).

The spelling of 70161870 in words is "seventy million, one hundred sixty-one thousand, eight hundred seventy".