40003437 has 4 divisors (see below), whose sum is σ = 53337920. Its totient is φ = 26668956.

The previous prime is 40003409. The next prime is 40003451. The reversal of 40003437 is 73430004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40003437 - 2²³ = 31614829 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 (40003477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6667237 + ... + 6667242.

It is an arithmetic number, because the mean of its divisors is an integer number (13334480).

Almost surely, 2^40003437 is an apocalyptic number.

It is an amenable number.

40003437 is a deficient number, since it is larger than the sum of its proper divisors (13334483).

40003437 is a wasteful number, since it uses less digits than its factorization.

40003437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13334482.

The product of its (nonzero) digits is 1008, while the sum is 21.

The square root of 40003437 is about 6324.8270332081. The cubic root of 40003437 is about 342.0049843670.

The spelling of 40003437 in words is "forty million, three thousand, four hundred thirty-seven".