40254664 has 8 divisors (see below), whose sum is σ = 75477510. Its totient is φ = 20127328.

The previous prime is 40254629. The next prime is 40254667. The reversal of 40254664 is 46645204.

It can be written as a sum of positive squares in only one way, i.e., 20629764 + 19624900 = 4542^2 + 4430^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (40254667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2515909 + ... + 2515924.

Almost surely, 2^40254664 is an apocalyptic number.

It is an amenable number.

40254664 is a deficient number, since it is larger than the sum of its proper divisors (35222846).

40254664 is a wasteful number, since it uses less digits than its factorization.

40254664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5031839 (or 5031835 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 40254664 is about 6344.6563342706. The cubic root of 40254664 is about 342.7194366960.

Adding to 40254664 its reverse (46645204), we get a palindrome (86899868).

The spelling of 40254664 in words is "forty million, two hundred fifty-four thousand, six hundred sixty-four".