70438520 has 32 divisors (see below), whose sum is σ = 158742720. Its totient is φ = 28129920.

The previous prime is 70438517. The next prime is 70438523. The reversal of 70438520 is 2583407.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (70438517) and next prime (70438523).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70438523) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 35474 + ... + 37406.

It is an arithmetic number, because the mean of its divisors is an integer number (4960710).

Almost surely, 2^70438520 is an apocalyptic number.

It is an amenable number.

70438520 is an abundant number, since it is smaller than the sum of its proper divisors (88304200).

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

70438520 is a wasteful number, since it uses less digits than its factorization.

70438520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2855 (or 2851 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 70438520 is about 8392.7659326351. The cubic root of 70438520 is about 412.9873419779.

The spelling of 70438520 in words is "seventy million, four hundred thirty-eight thousand, five hundred twenty".