40025811 has 32 divisors (see below), whose sum is σ = 63037440. Its totient is φ = 22117536.

The previous prime is 40025807. The next prime is 40025833. The reversal of 40025811 is 11852004.

It is not a de Polignac number, because 40025811 - 2² = 40025807 is a prime.

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 (40025861) 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, 105420 + ... + 105798.

It is an arithmetic number, because the mean of its divisors is an integer number (1969920).

Almost surely, 2^40025811 is an apocalyptic number.

40025811 is a deficient number, since it is larger than the sum of its proper divisors (23011629).

40025811 is a wasteful number, since it uses less digits than its factorization.

40025811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 40025811 is about 6326.5955299829. The cubic root of 40025811 is about 342.0687338341.

Adding to 40025811 its reverse (11852004), we get a palindrome (51877815).

The spelling of 40025811 in words is "forty million, twenty-five thousand, eight hundred eleven".