40400000437 has 4 divisors (see below), whose sum is σ = 40435040620. Its totient is φ = 40364960256.

The previous prime is 40400000423. The next prime is 40400000441. The reversal of 40400000437 is 73400000404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30167868721 + 10232131716 = 173689^2 + 101154^2 .

It is a cyclic number.

It is not a de Polignac number, because 40400000437 - 2⁷ = 40400000309 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 (40400000497) 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, 17518362 + ... + 17520667.

It is an arithmetic number, because the mean of its divisors is an integer number (10108760155).

Almost surely, 2^40400000437 is an apocalyptic number.

It is an amenable number.

40400000437 is a deficient number, since it is larger than the sum of its proper divisors (35040183).

40400000437 is a wasteful number, since it uses less digits than its factorization.

40400000437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35040182.

The product of its (nonzero) digits is 1344, while the sum is 22.

The spelling of 40400000437 in words is "forty billion, four hundred million, four hundred thirty-seven", and thus it is an aban number.