70145724 has 48 divisors (see below), whose sum is σ = 179415936. Its totient is φ = 21153600.

The previous prime is 70145683. The next prime is 70145729. The reversal of 70145724 is 42754107.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 70145691 and 70145700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70145729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28794 + ... + 31134.

It is an arithmetic number, because the mean of its divisors is an integer number (3737832).

Almost surely, 2^70145724 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70145724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89707968).

70145724 is an abundant number, since it is smaller than the sum of its proper divisors (109270212).

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

70145724 is a wasteful number, since it uses less digits than its factorization.

70145724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2586 (or 2584 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 70145724 is about 8375.3044123781. The cubic root of 70145724 is about 412.4143175572.

The spelling of 70145724 in words is "seventy million, one hundred forty-five thousand, seven hundred twenty-four".