40029509 has 12 divisors (see below), whose sum is σ = 45898596. Its totient is φ = 34774272.

The previous prime is 40029503. The next prime is 40029527. The reversal of 40029509 is 90592004.

It can be written as a sum of positive squares in 6 ways, for example, as 616225 + 39413284 = 785^2 + 6278^2 .

It is not a de Polignac number, because 40029509 - 2¹² = 40025413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40029503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4094 + ... + 9839.

It is an arithmetic number, because the mean of its divisors is an integer number (3824883).

Almost surely, 2^40029509 is an apocalyptic number.

It is an amenable number.

40029509 is a deficient number, since it is larger than the sum of its proper divisors (5869087).

40029509 is a wasteful number, since it uses less digits than its factorization.

40029509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13976 (or 13963 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 40029509 is about 6326.8877815242. The cubic root of 40029509 is about 342.0792681301.

The spelling of 40029509 in words is "forty million, twenty-nine thousand, five hundred nine".