40445923 has 12 divisors (see below), whose sum is σ = 48673440. Its totient is φ = 33471312.

The previous prime is 40445903. The next prime is 40445953. The reversal of 40445923 is 32954404.

It is a happy number.

It is not a de Polignac number, because 40445923 - 2¹³ = 40437731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40445903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12811 + ... + 15652.

It is an arithmetic number, because the mean of its divisors is an integer number (4056120).

Almost surely, 2^40445923 is an apocalyptic number.

40445923 is a deficient number, since it is larger than the sum of its proper divisors (8227517).

40445923 is a wasteful number, since it uses less digits than its factorization.

40445923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28506 (or 28499 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 40445923 is about 6359.7109211033. The cubic root of 40445923 is about 343.2613584843.

The spelling of 40445923 in words is "forty million, four hundred forty-five thousand, nine hundred twenty-three".