40352749 has 4 divisors (see below), whose sum is σ = 40370400. Its totient is φ = 40335100.

The previous prime is 40352729. The next prime is 40352771. The reversal of 40352749 is 94725304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40352749 - 2⁷ = 40352621 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40352729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4777 + ... + 10174.

It is an arithmetic number, because the mean of its divisors is an integer number (10092600).

Almost surely, 2^40352749 is an apocalyptic number.

It is an amenable number.

40352749 is a deficient number, since it is larger than the sum of its proper divisors (17651).

40352749 is a wasteful number, since it uses less digits than its factorization.

40352749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17650.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 40352749 is about 6352.3813644963. The cubic root of 40352749 is about 342.9975690229.

The spelling of 40352749 in words is "forty million, three hundred fifty-two thousand, seven hundred forty-nine".