40304631 has 16 divisors (see below), whose sum is σ = 55197824. Its totient is φ = 26145504.

The previous prime is 40304623. The next prime is 40304633. The reversal of 40304631 is 13640304.

It is not a de Polignac number, because 40304631 - 2³ = 40304623 is a prime.

It is a super-2 number, since 2×40304631² = 3248926560092322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40304598 and 40304607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40304633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50820 + ... + 51606.

It is an arithmetic number, because the mean of its divisors is an integer number (3449864).

Almost surely, 2^40304631 is an apocalyptic number.

40304631 is a deficient number, since it is larger than the sum of its proper divisors (14893193).

40304631 is a wasteful number, since it uses less digits than its factorization.

40304631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 40304631 is about 6348.5928362118. The cubic root of 40304631 is about 342.8611807808.

Adding to 40304631 its reverse (13640304), we get a palindrome (53944935).

The spelling of 40304631 in words is "forty million, three hundred four thousand, six hundred thirty-one".