70644042 has 32 divisors (see below), whose sum is σ = 179414400. Its totient is φ = 20183904.

The previous prime is 70644023. The next prime is 70644047. The reversal of 70644042 is 24044607.

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

It is a junction number, because it is equal to n+sod(n) for n = 70643997 and 70644015.

It is not an unprimeable number, because it can be changed into a prime (70644047) by changing a digit.

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, 93067 + ... + 93822.

It is an arithmetic number, because the mean of its divisors is an integer number (5606700).

Almost surely, 2^70644042 is an apocalyptic number.

70644042 is an abundant number, since it is smaller than the sum of its proper divisors (108770358).

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

70644042 is a wasteful number, since it uses less digits than its factorization.

70644042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186907 (or 186901 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 70644042 is about 8405.0010113027. The cubic root of 70644042 is about 413.3886165794.

Adding to 70644042 its reverse (24044607), we get a palindrome (94688649).

The spelling of 70644042 in words is "seventy million, six hundred forty-four thousand, forty-two".