40426538 has 4 divisors (see below), whose sum is σ = 60639810. Its totient is φ = 20213268.

The previous prime is 40426537. The next prime is 40426553. The reversal of 40426538 is 83562404.

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

It can be written as a sum of positive squares in only one way, i.e., 40284409 + 142129 = 6347^2 + 377^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40426537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106633 + ... + 10106636.

Almost surely, 2^40426538 is an apocalyptic number.

40426538 is a deficient number, since it is larger than the sum of its proper divisors (20213272).

40426538 is a wasteful number, since it uses less digits than its factorization.

40426538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20213271.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 40426538 is about 6358.1866911880. The cubic root of 40426538 is about 343.2065100654.

The spelling of 40426538 in words is "forty million, four hundred twenty-six thousand, five hundred thirty-eight".