70312032 has 72 divisors (see below), whose sum is σ = 228520656. Its totient is φ = 20088576.

The previous prime is 70312031. The next prime is 70312043. The reversal of 70312032 is 23021307.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 70311996 and 70312014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70312031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15423 + ... + 19454.

It is an arithmetic number, because the mean of its divisors is an integer number (3173898).

Almost surely, 2^70312032 is an apocalyptic number.

70312032 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

70312032 is an abundant number, since it is smaller than the sum of its proper divisors (158208624).

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

70312032 is a wasteful number, since it uses less digits than its factorization.

70312032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34900 (or 34889 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 70312032 is about 8385.2270094494. The cubic root of 70312032 is about 412.7399903753.

Adding to 70312032 its reverse (23021307), we get a palindrome (93333339).

The spelling of 70312032 in words is "seventy million, three hundred twelve thousand, thirty-two".