40249765 has 4 divisors (see below), whose sum is σ = 48299724. Its totient is φ = 32199808.

The previous prime is 40249757. The next prime is 40249777. The reversal of 40249765 is 56794204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24137569 + 16112196 = 4913^2 + 4014^2 .

It is a cyclic number.

It is not a de Polignac number, because 40249765 - 2³ = 40249757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4024972 + ... + 4024981.

It is an arithmetic number, because the mean of its divisors is an integer number (12074931).

Almost surely, 2^40249765 is an apocalyptic number.

It is an amenable number.

40249765 is a deficient number, since it is larger than the sum of its proper divisors (8049959).

40249765 is an equidigital number, since it uses as much as digits as its factorization.

40249765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8049958.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 40249765 is about 6344.2702496032. The cubic root of 40249765 is about 342.7055331259.

It can be divided in two parts, 40249 and 765, that added together give a palindrome (41014).

The spelling of 40249765 in words is "forty million, two hundred forty-nine thousand, seven hundred sixty-five".