40302570 has 128 divisors (see below), whose sum is σ = 122757120. Its totient is φ = 8225280.

The previous prime is 40302557. The next prime is 40302571. The reversal of 40302570 is 7520304.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (40302571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 168511 + ... + 168749.

It is an arithmetic number, because the mean of its divisors is an integer number (959040).

Almost surely, 2^40302570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40302570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61378560).

40302570 is an abundant number, since it is smaller than the sum of its proper divisors (82454550).

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

40302570 is a wasteful number, since it uses less digits than its factorization.

40302570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 40302570 is about 6348.4305147020. The cubic root of 40302570 is about 342.8553365480.

Adding to 40302570 its reverse (7520304), we get a palindrome (47822874).

The spelling of 40302570 in words is "forty million, three hundred two thousand, five hundred seventy".