40051404 has 36 divisors (see below), whose sum is σ = 103599496. Its totient is φ = 13039488.

The previous prime is 40051393. The next prime is 40051409. The reversal of 40051404 is 40415004.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×40051404² = 3208229924742432, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (40051409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11389 + ... + 14484.

Almost surely, 2^40051404 is an apocalyptic number.

It is an amenable number.

40051404 is an abundant number, since it is smaller than the sum of its proper divisors (63548092).

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

40051404 is a wasteful number, since it uses less digits than its factorization.

40051404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25926 (or 25921 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40051404 is about 6328.6178585849. The cubic root of 40051404 is about 342.1416259639.

Adding to 40051404 its reverse (40415004), we get a palindrome (80466408).

The spelling of 40051404 in words is "forty million, fifty-one thousand, four hundred four".