40102909 has 24 divisors (see below), whose sum is σ = 50944320. Its totient is φ = 30898560.

The previous prime is 40102897. The next prime is 40102913. The reversal of 40102909 is 90920104.

It is not a de Polignac number, because 40102909 - 2¹¹ = 40100861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40102999) 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, 95502 + ... + 95920.

It is an arithmetic number, because the mean of its divisors is an integer number (2122680).

Almost surely, 2^40102909 is an apocalyptic number.

It is an amenable number.

40102909 is a deficient number, since it is larger than the sum of its proper divisors (10841411).

40102909 is a wasteful number, since it uses less digits than its factorization.

40102909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 40102909 is about 6332.6857651395. The cubic root of 40102909 is about 342.2882247035.

The spelling of 40102909 in words is "forty million, one hundred two thousand, nine hundred nine".