40257953 has 4 divisors (see below), whose sum is σ = 40272660. Its totient is φ = 40243248.

The previous prime is 40257947. The next prime is 40257983. The reversal of 40257953 is 35975204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2226064 + 38031889 = 1492^2 + 6167^2 .

It is a cyclic number.

It is not a de Polignac number, because 40257953 - 2⁴ = 40257937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40257913) 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 3 ways as a sum of consecutive naturals, for example, 1898 + ... + 9171.

It is an arithmetic number, because the mean of its divisors is an integer number (10068165).

Almost surely, 2^40257953 is an apocalyptic number.

40257953 is the 3392-nd centered heptagonal number.

It is an amenable number.

40257953 is a deficient number, since it is larger than the sum of its proper divisors (14707).

40257953 is a wasteful number, since it uses less digits than its factorization.

40257953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14706.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 40257953 is about 6344.9155234723. The cubic root of 40257953 is about 342.7287703849.

The spelling of 40257953 in words is "forty million, two hundred fifty-seven thousand, nine hundred fifty-three".