70381520 has 40 divisors (see below), whose sum is σ = 178515360. Its totient is φ = 25592960.

The previous prime is 70381499. The next prime is 70381537. The reversal of 70381520 is 2518307.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 70381520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39110 + ... + 40869.

It is an arithmetic number, because the mean of its divisors is an integer number (4462884).

Almost surely, 2^70381520 is an apocalyptic number.

It is an amenable number.

70381520 is an abundant number, since it is smaller than the sum of its proper divisors (108133840).

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

70381520 is a wasteful number, since it uses less digits than its factorization.

70381520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80003 (or 79997 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 70381520 is about 8389.3694637917. The cubic root of 70381520 is about 412.8759132167.

Adding to 70381520 its reverse (2518307), we get a palindrome (72899827).

It can be divided in two parts, 7038 and 1520, that added together give a palindrome (8558).

The spelling of 70381520 in words is "seventy million, three hundred eighty-one thousand, five hundred twenty".