70312440 has 64 divisors (see below), whose sum is σ = 230117760. Its totient is φ = 17045120.

The previous prime is 70312421. The next prime is 70312481. The reversal of 70312440 is 4421307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25314 + ... + 27953.

It is an arithmetic number, because the mean of its divisors is an integer number (3595590).

Almost surely, 2^70312440 is an apocalyptic number.

It is an amenable number.

70312440 is an abundant number, since it is smaller than the sum of its proper divisors (159805320).

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

70312440 is a wasteful number, since it uses less digits than its factorization.

70312440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53292 (or 53288 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 70312440 is about 8385.2513379147. The cubic root of 70312440 is about 412.7407887099.

Adding to 70312440 its reverse (4421307), we get a palindrome (74733747).

The spelling of 70312440 in words is "seventy million, three hundred twelve thousand, four hundred forty".