40001706 has 12 divisors (see below), whose sum is σ = 86670402. Its totient is φ = 13333896.

The previous prime is 40001657. The next prime is 40001711. The reversal of 40001706 is 60710004.

It can be written as a sum of positive squares in only one way, i.e., 28037025 + 11964681 = 5295^2 + 3459^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2222317 = 40001706 / (4 + 0 + 0 + 0 + 1 + 7 + 0 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111141 + ... + 1111176.

Almost surely, 2^40001706 is an apocalyptic number.

40001706 is an abundant number, since it is smaller than the sum of its proper divisors (46668696).

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

40001706 is a wasteful number, since it uses less digits than its factorization.

40001706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222325 (or 2222322 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 40001706 is about 6324.6901900409. The cubic root of 40001706 is about 342.0000512978. Note that the first 4 decimals are identical.

Subtracting from 40001706 its sum of digits (18), we obtain a cube (40001688 = 342³).

The spelling of 40001706 in words is "forty million, one thousand, seven hundred six".