70181540 has 96 divisors (see below), whose sum is σ = 176795136. Its totient is φ = 23063040.

The previous prime is 70181539. The next prime is 70181549. The reversal of 70181540 is 4518107.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (70181549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151349 + ... + 151811.

It is an arithmetic number, because the mean of its divisors is an integer number (1841616).

Almost surely, 2^70181540 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 70181540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88397568).

70181540 is an abundant number, since it is smaller than the sum of its proper divisors (106613596).

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

70181540 is a wasteful number, since it uses less digits than its factorization.

70181540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 70181540 is about 8377.4423304491. The cubic root of 70181540 is about 412.4844977339.

Adding to 70181540 its reverse (4518107), we get a palindrome (74699647).

It can be divided in two parts, 7018 and 1540, that added together give a palindrome (8558).

The spelling of 70181540 in words is "seventy million, one hundred eighty-one thousand, five hundred forty".