40807749 has 8 divisors (see below), whose sum is σ = 56165632. Its totient is φ = 26327520.

The previous prime is 40807733. The next prime is 40807771. The reversal of 40807749 is 94770804.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40807749 - 2⁴ = 40807733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40807709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219304 + ... + 219489.

It is an arithmetic number, because the mean of its divisors is an integer number (7020704).

Almost surely, 2^40807749 is an apocalyptic number.

It is an amenable number.

40807749 is a deficient number, since it is larger than the sum of its proper divisors (15357883).

40807749 is a wasteful number, since it uses less digits than its factorization.

40807749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438827.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 40807749 is about 6388.0943167740. The cubic root of 40807749 is about 344.2819174691.

The spelling of 40807749 in words is "forty million, eight hundred seven thousand, seven hundred forty-nine".