40011890 has 16 divisors (see below), whose sum is σ = 72109440. Its totient is φ = 15985200.

The previous prime is 40011889. The next prime is 40011943. The reversal of 40011890 is 9811004.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8465 + ... + 12315.

It is an arithmetic number, because the mean of its divisors is an integer number (4506840).

Almost surely, 2^40011890 is an apocalyptic number.

40011890 is a deficient number, since it is larger than the sum of its proper divisors (32097550).

40011890 is a wasteful number, since it uses less digits than its factorization.

40011890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4897.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 40011890 is about 6325.4952375288. The cubic root of 40011890 is about 342.0290720017.

Adding to 40011890 its reverse (9811004), we get a palindrome (49822894).

The spelling of 40011890 in words is "forty million, eleven thousand, eight hundred ninety".