40040025 has 24 divisors (see below), whose sum is σ = 66662400. Its totient is φ = 21205440.

The previous prime is 40040017. The next prime is 40040027. The reversal of 40040025 is 52004004.

It is not a de Polignac number, because 40040025 - 2³ = 40040017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 40039986 and 40040013.

It is not an unprimeable number, because it can be changed into a prime (40040027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9384 + ... + 12966.

It is an arithmetic number, because the mean of its divisors is an integer number (2777600).

Almost surely, 2^40040025 is an apocalyptic number.

It is an amenable number.

40040025 is a deficient number, since it is larger than the sum of its proper divisors (26622375).

40040025 is a wasteful number, since it uses less digits than its factorization.

40040025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745 (or 3740 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 40040025 is about 6327.7187832583. The cubic root of 40040025 is about 342.1092209549.

Adding to 40040025 its reverse (52004004), we get a palindrome (92044029).

The spelling of 40040025 in words is "forty million, forty thousand, twenty-five".