1000400694 has 16 divisors (see below), whose sum is σ = 2001119232. Its totient is φ = 333413928.

The previous prime is 1000400693. The next prime is 1000400729. The reversal of 1000400694 is 4960040001.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000400693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53727 + ... + 69909.

It is an arithmetic number, because the mean of its divisors is an integer number (125069952).

Almost surely, 2^1000400694 is an apocalyptic number.

1000400694 is an abundant number, since it is smaller than the sum of its proper divisors (1000718538).

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

1000400694 is a wasteful number, since it uses less digits than its factorization.

1000400694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26491.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1000400694 is about 31629.1114955827. Note that the first 3 decimals coincide. The cubic root of 1000400694 is about 1000.1335468311.

Adding to 1000400694 its reverse (4960040001), we get a palindrome (5960440695).

The spelling of 1000400694 in words is "one billion, four hundred thousand, six hundred ninety-four".