70443540 has 96 divisors (see below), whose sum is σ = 222284160. Its totient is φ = 18517248.

The previous prime is 70443533. The next prime is 70443551. The reversal of 70443540 is 4534407.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38527 + ... + 40313.

It is an arithmetic number, because the mean of its divisors is an integer number (2315460).

Almost surely, 2^70443540 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 70443540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111142080).

70443540 is an abundant number, since it is smaller than the sum of its proper divisors (151840620).

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

70443540 is a wasteful number, since it uses less digits than its factorization.

70443540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878 (or 1870 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 70443540 is about 8393.0649943867. The cubic root of 70443540 is about 412.9971526478.

Adding to 70443540 its reverse (4534407), we get a palindrome (74977947).

It can be divided in two parts, 704 and 43540, that added together give a palindrome (44244).

The spelling of 70443540 in words is "seventy million, four hundred forty-three thousand, five hundred forty".