40301640 has 48 divisors (see below), whose sum is σ = 130981500. Its totient is φ = 10747008.

The previous prime is 40301629. The next prime is 40301689. The reversal of 40301640 is 4610304.

It can be written as a sum of positive squares in 2 ways, for example, as 33108516 + 7193124 = 5754^2 + 2682^2 .

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 11 ways as a sum of consecutive naturals, for example, 55615 + ... + 56334.

Almost surely, 2^40301640 is an apocalyptic number.

40301640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40301640 is an abundant number, since it is smaller than the sum of its proper divisors (90679860).

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

40301640 is a wasteful number, since it uses less digits than its factorization.

40301640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111966 (or 111959 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 40301640 is about 6348.3572678292. The cubic root of 40301640 is about 342.8526993472.

Adding to 40301640 its reverse (4610304), we get a palindrome (44911944).

The spelling of 40301640 in words is "forty million, three hundred one thousand, six hundred forty".