70072040 has 16 divisors (see below), whose sum is σ = 157662180. Its totient is φ = 28028800.

The previous prime is 70072039. The next prime is 70072061. The reversal of 70072040 is 4027007.

It can be written as a sum of positive squares in 2 ways, for example, as 69923044 + 148996 = 8362^2 + 386^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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 3 ways as a sum of consecutive naturals, for example, 875861 + ... + 875940.

Almost surely, 2^70072040 is an apocalyptic number.

It is an amenable number.

70072040 is an abundant number, since it is smaller than the sum of its proper divisors (87590140).

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

70072040 is a wasteful number, since it uses less digits than its factorization.

70072040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751812 (or 1751808 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 70072040 is about 8370.9043716913. The cubic root of 70072040 is about 412.2698612195.

Adding to 70072040 its reverse (4027007), we get a palindrome (74099047).

The spelling of 70072040 in words is "seventy million, seventy-two thousand, forty".