40290437 has 4 divisors (see below), whose sum is σ = 43953216. Its totient is φ = 36627660.

The previous prime is 40290409. The next prime is 40290463. The reversal of 40290437 is 73409204.

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 a cyclic number.

It is not a de Polignac number, because 40290437 - 2¹⁰ = 40289413 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 (40290337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1831373 + ... + 1831394.

It is an arithmetic number, because the mean of its divisors is an integer number (10988304).

Almost surely, 2^40290437 is an apocalyptic number.

It is an amenable number.

40290437 is a deficient number, since it is larger than the sum of its proper divisors (3662779).

40290437 is a wasteful number, since it uses less digits than its factorization.

40290437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3662778.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 40290437 is about 6347.4748522542. The cubic root of 40290437 is about 342.8209278134.

The spelling of 40290437 in words is "forty million, two hundred ninety thousand, four hundred thirty-seven".