40244004 has 18 divisors (see below), whose sum is σ = 101727990. Its totient is φ = 13414656.

The previous prime is 40243991. The next prime is 40244011. The reversal of 40244004 is 40044204.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 26936100 + 13307904 = 5190^2 + 3648^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 558909 + ... + 558980.

It is an arithmetic number, because the mean of its divisors is an integer number (5651555).

Almost surely, 2^40244004 is an apocalyptic number.

It is an amenable number.

40244004 is an abundant number, since it is smaller than the sum of its proper divisors (61483986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40244004 is a wasteful number, since it uses less digits than its factorization.

40244004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117899 (or 1117894 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 40244004 is about 6343.8162016250. The cubic root of 40244004 is about 342.6891817196.

Adding to 40244004 its reverse (40044204), we get a palindrome (80288208).

The spelling of 40244004 in words is "forty million, two hundred forty-four thousand, four".