40997826 has 40 divisors (see below), whose sum is σ = 92848140. Its totient is φ = 13519872.

The previous prime is 40997807. The next prime is 40997837. The reversal of 40997826 is 62879904.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40947201 + 50625 = 6399^2 + 225^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14410 + ... + 17018.

Almost surely, 2^40997826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40997826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46424070).

40997826 is an abundant number, since it is smaller than the sum of its proper divisors (51850314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40997826 is a wasteful number, since it uses less digits than its factorization.

40997826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2720 (or 2711 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 40997826 is about 6402.9544743032. The cubic root of 40997826 is about 344.8156292767.

The spelling of 40997826 in words is "forty million, nine hundred ninety-seven thousand, eight hundred twenty-six".