70391040 has 144 divisors (see below), whose sum is σ = 234880128. Its totient is φ = 17932288.

The previous prime is 70391023. The next prime is 70391059. The reversal of 70391040 is 4019307.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 70391040.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87922 + ... + 88718.

It is an arithmetic number, because the mean of its divisors is an integer number (1631112).

Almost surely, 2^70391040 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 70391040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117440064).

70391040 is an abundant number, since it is smaller than the sum of its proper divisors (164489088).

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

70391040 is a wasteful number, since it uses less digits than its factorization.

70391040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844 (or 830 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 70391040 is about 8389.9368293212. The cubic root of 70391040 is about 412.8945279586.

The spelling of 70391040 in words is "seventy million, three hundred ninety-one thousand, forty".