40406252 has 6 divisors (see below), whose sum is σ = 70710948. Its totient is φ = 20203124.

The previous prime is 40406167. The next prime is 40406273. The reversal of 40406252 is 25260404.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050778 + ... + 5050785.

It is an arithmetic number, because the mean of its divisors is an integer number (11785158).

Almost surely, 2^40406252 is an apocalyptic number.

It is an amenable number.

40406252 is a deficient number, since it is larger than the sum of its proper divisors (30304696).

40406252 is a wasteful number, since it uses less digits than its factorization.

40406252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10101567 (or 10101565 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40406252 is about 6356.5912248626. The cubic root of 40406252 is about 343.1490935556.

Adding to 40406252 its reverse (25260404), we get a palindrome (65666656).

The spelling of 40406252 in words is "forty million, four hundred six thousand, two hundred fifty-two".