70529520 has 80 divisors (see below), whose sum is σ = 230163840. Its totient is φ = 17816832.

The previous prime is 70529507. The next prime is 70529521. The reversal of 70529520 is 2592507.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70529521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3174 + ... + 12293.

It is an arithmetic number, because the mean of its divisors is an integer number (2877048).

Almost surely, 2^70529520 is an apocalyptic number.

It is an amenable number.

70529520 is an abundant number, since it is smaller than the sum of its proper divisors (159634320).

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

70529520 is a wasteful number, since it uses less digits than its factorization.

70529520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15502 (or 15496 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 70529520 is about 8398.1855183129. The cubic root of 70529520 is about 413.1651124916.

The spelling of 70529520 in words is "seventy million, five hundred twenty-nine thousand, five hundred twenty".