40648869 has 6 divisors (see below), whose sum is σ = 58715046. Its totient is φ = 27099240.

The previous prime is 40648837. The next prime is 40648871. The reversal of 40648869 is 96884604.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 37088100 + 3560769 = 6090^2 + 1887^2 .

It is not a de Polignac number, because 40648869 - 2⁵ = 40648837 is a prime.

It is a super-2 number, since 2×40648869² = 3304661101958322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40648369) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2258262 + ... + 2258279.

It is an arithmetic number, because the mean of its divisors is an integer number (9785841).

Almost surely, 2^40648869 is an apocalyptic number.

It is an amenable number.

40648869 is a deficient number, since it is larger than the sum of its proper divisors (18066177).

40648869 is a wasteful number, since it uses less digits than its factorization.

40648869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4516547 (or 4516544 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 40648869 is about 6375.6465554483. The cubic root of 40648869 is about 343.8345297795.

The spelling of 40648869 in words is "forty million, six hundred forty-eight thousand, eight hundred sixty-nine".