40180788 has 18 divisors (see below), whose sum is σ = 101568194. Its totient is φ = 13393584.

The previous prime is 40180783. The next prime is 40180841. The reversal of 40180788 is 88708104.

It can be written as a sum of positive squares in only one way, i.e., 34363044 + 5817744 = 5862^2 + 2412^2 .

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

It is a super-2 number, since 2×40180788² = 3228991448601888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1116133 = 40180788 / (4 + 0 + 1 + 8 + 0 + 7 + 8 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40180783) 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 5 ways as a sum of consecutive naturals, for example, 558031 + ... + 558102.

Almost surely, 2^40180788 is an apocalyptic number.

It is an amenable number.

40180788 is an abundant number, since it is smaller than the sum of its proper divisors (61387406).

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

40180788 is a wasteful number, since it uses less digits than its factorization.

40180788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116143 (or 1116138 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 40180788 is about 6338.8317535647. The cubic root of 40180788 is about 342.5096535898.

The spelling of 40180788 in words is "forty million, one hundred eighty thousand, seven hundred eighty-eight".