70143450 has 72 divisors (see below), whose sum is σ = 188434368. Its totient is φ = 17259840.

The previous prime is 70143443. The next prime is 70143461. The reversal of 70143450 is 5434107.

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

It is a self number, because there is not a number n which added to its sum of digits gives 70143450.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 23967 + ... + 26733.

It is an arithmetic number, because the mean of its divisors is an integer number (2617144).

Almost surely, 2^70143450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70143450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94217184).

70143450 is an abundant number, since it is smaller than the sum of its proper divisors (118290918).

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

70143450 is a wasteful number, since it uses less digits than its factorization.

70143450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808 (or 2790 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 70143450 is about 8375.1686550182. The cubic root of 70143450 is about 412.4098609288.

Adding to 70143450 its reverse (5434107), we get a palindrome (75577557).

The spelling of 70143450 in words is "seventy million, one hundred forty-three thousand, four hundred fifty".