40231906 has 64 divisors (see below), whose sum is σ = 75188736. Its totient is φ = 15897600.

The previous prime is 40231901. The next prime is 40231907. The reversal of 40231906 is 60913204.

It is not an unprimeable number, because it can be changed into a prime (40231901) 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, 551086 + ... + 551158.

It is an arithmetic number, because the mean of its divisors is an integer number (1174824).

Almost surely, 2^40231906 is an apocalyptic number.

40231906 is a deficient number, since it is larger than the sum of its proper divisors (34956830).

40231906 is a wasteful number, since it uses less digits than its factorization.

40231906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 40231906 is about 6342.8626029578. The cubic root of 40231906 is about 342.6548389703.

It can be divided in two parts, 4023 and 1906, that added together give a square (5929 = 77²).

The spelling of 40231906 in words is "forty million, two hundred thirty-one thousand, nine hundred six".