70040040 has 128 divisors (see below), whose sum is σ = 241920000. Its totient is φ = 15890688.

The previous prime is 70040027. The next prime is 70040059. The reversal of 70040040 is 4004007.

It is a Harshad number since it is a multiple of its sum of digits (15).

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 31 ways as a sum of consecutive naturals, for example, 166951 + ... + 167369.

It is an arithmetic number, because the mean of its divisors is an integer number (1890000).

Almost surely, 2^70040040 is an apocalyptic number.

70040040 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 70040040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120960000).

70040040 is an abundant number, since it is smaller than the sum of its proper divisors (171879960).

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

70040040 is a wasteful number, since it uses less digits than its factorization.

70040040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 15.

The square root of 70040040 is about 8368.9927709373. The cubic root of 70040040 is about 412.2070941762.

Adding to 70040040 its reverse (4004007), we get a palindrome (74044047).

The spelling of 70040040 in words is "seventy million, forty thousand, forty".