70045640 has 64 divisors (see below), whose sum is σ = 182044800. Its totient is φ = 23758848.

The previous prime is 70045639. The next prime is 70045663. The reversal of 70045640 is 4654007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25871 + ... + 28449.

It is an arithmetic number, because the mean of its divisors is an integer number (2844450).

Almost surely, 2^70045640 is an apocalyptic number.

70045640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70045640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91022400).

70045640 is an abundant number, since it is smaller than the sum of its proper divisors (111999160).

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

70045640 is a wasteful number, since it uses less digits than its factorization.

70045640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694 (or 2690 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 70045640 is about 8369.3273325877. The cubic root of 70045640 is about 412.2180797887.

Adding to 70045640 its reverse (4654007), we get a palindrome (74699647).

The spelling of 70045640 in words is "seventy million, forty-five thousand, six hundred forty".