40688001 has 10 divisors (see below), whose sum is σ = 60780962. Its totient is φ = 27125280.

The previous prime is 40687991. The next prime is 40688003. The reversal of 40688001 is 10088604.

It can be written as a sum of positive squares in only one way, i.e., 39690000 + 998001 = 6300^2 + 999^2 .

It is not a de Polignac number, because 40688001 - 2¹⁹ = 40163713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40688003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 251080 + ... + 251241.

Almost surely, 2^40688001 is an apocalyptic number.

It is an amenable number.

40688001 is a deficient number, since it is larger than the sum of its proper divisors (20092961).

40688001 is an equidigital number, since it uses as much as digits as its factorization.

40688001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502333 (or 502324 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 40688001 is about 6378.7146824419. The cubic root of 40688001 is about 343.9448290149.

The spelling of 40688001 in words is "forty million, six hundred eighty-eight thousand, one".