70143870 has 32 divisors (see below), whose sum is σ = 178249248. Its totient is φ = 17604608.

The previous prime is 70143869. The next prime is 70143883. The reversal of 70143870 is 7834107.

It is a happy number.

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 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, 68259 + ... + 69278.

It is an arithmetic number, because the mean of its divisors is an integer number (5570289).

Almost surely, 2^70143870 is an apocalyptic number.

70143870 is an abundant number, since it is smaller than the sum of its proper divisors (108105378).

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

70143870 is a wasteful number, since it uses less digits than its factorization.

70143870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137564.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 70143870 is about 8375.1937291026. The cubic root of 70143870 is about 412.4106840600.

Adding to 70143870 its reverse (7834107), we get a palindrome (77977977).

The spelling of 70143870 in words is "seventy million, one hundred forty-three thousand, eight hundred seventy".