70407040 has 128 divisors (see below), whose sum is σ = 187492320. Its totient is φ = 25067520.

The previous prime is 70407037. The next prime is 70407049. The reversal of 70407040 is 4070407.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70407049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513852 + ... + 513988.

Almost surely, 2^70407040 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 70407040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93746160).

70407040 is an abundant number, since it is smaller than the sum of its proper divisors (117085280).

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

70407040 is a wasteful number, since it uses less digits than its factorization.

70407040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 70407040 is about 8390.8902984129. The cubic root of 70407040 is about 412.9258094587.

Adding to 70407040 its reverse (4070407), we get a palindrome (74477447).

The spelling of 70407040 in words is "seventy million, four hundred seven thousand, forty".