40099625 has 16 divisors (see below), whose sum is σ = 50403600. Its totient is φ = 31849600.

The previous prime is 40099621. The next prime is 40099627. The reversal of 40099625 is 52699004.

It can be written as a sum of positive squares in 8 ways, for example, as 31147561 + 8952064 = 5581^2 + 2992^2 .

It is not a de Polignac number, because 40099625 - 2² = 40099621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40099621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17549 + ... + 19701.

It is an arithmetic number, because the mean of its divisors is an integer number (3150225).

Almost surely, 2^40099625 is an apocalyptic number.

It is an amenable number.

40099625 is a deficient number, since it is larger than the sum of its proper divisors (10303975).

40099625 is a wasteful number, since it uses less digits than its factorization.

40099625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317 (or 2307 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 40099625 is about 6332.4264701613. The cubic root of 40099625 is about 342.2788811983.

The spelling of 40099625 in words is "forty million, ninety-nine thousand, six hundred twenty-five".