70023840 has 96 divisors (see below), whose sum is σ = 222699456. Its totient is φ = 18493440.

The previous prime is 70023839. The next prime is 70023857. The reversal of 70023840 is 4832007.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 70023840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53595 + ... + 54885.

It is an arithmetic number, because the mean of its divisors is an integer number (2319786).

Almost surely, 2^70023840 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 70023840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111349728).

70023840 is an abundant number, since it is smaller than the sum of its proper divisors (152675616).

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

70023840 is a wasteful number, since it uses less digits than its factorization.

70023840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422 (or 1414 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 70023840 is about 8368.0248565596. The cubic root of 70023840 is about 412.1753110712.

Adding to 70023840 its reverse (4832007), we get a palindrome (74855847).

The spelling of 70023840 in words is "seventy million, twenty-three thousand, eight hundred forty".