40099647 has 24 divisors (see below), whose sum is σ = 63170688. Its totient is φ = 22163760.

The previous prime is 40099643. The next prime is 40099669. The reversal of 40099647 is 74699004.

It is not a de Polignac number, because 40099647 - 2² = 40099643 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40099643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19188 + ... + 21174.

It is an arithmetic number, because the mean of its divisors is an integer number (2632112).

Almost surely, 2^40099647 is an apocalyptic number.

40099647 is a deficient number, since it is larger than the sum of its proper divisors (23071041).

40099647 is a wasteful number, since it uses less digits than its factorization.

40099647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059 (or 2028 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 40099647 is about 6332.4282072519. The cubic root of 40099647 is about 342.2789437935.

The spelling of 40099647 in words is "forty million, ninety-nine thousand, six hundred forty-seven".