40372509 has 8 divisors (see below), whose sum is σ = 55566592. Its totient is φ = 26046720.

The previous prime is 40372499. The next prime is 40372531. The reversal of 40372509 is 90527304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40372509 - 2⁵ = 40372477 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 (40372559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216964 + ... + 217149.

It is an arithmetic number, because the mean of its divisors is an integer number (6945824).

Almost surely, 2^40372509 is an apocalyptic number.

It is an amenable number.

40372509 is a deficient number, since it is larger than the sum of its proper divisors (15194083).

40372509 is a wasteful number, since it uses less digits than its factorization.

40372509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434147.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 40372509 is about 6353.9364963777. The cubic root of 40372509 is about 343.0535464233.

The spelling of 40372509 in words is "forty million, three hundred seventy-two thousand, five hundred nine".