40040426 has 8 divisors (see below), whose sum is σ = 60644064. Its totient is φ = 19825740.

The previous prime is 40040411. The next prime is 40040471. The reversal of 40040426 is 62404004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×40040426² = 3206471428522952, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40040398 and 40040407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96980 + ... + 97391.

It is an arithmetic number, because the mean of its divisors is an integer number (7580508).

Almost surely, 2^40040426 is an apocalyptic number.

40040426 is a deficient number, since it is larger than the sum of its proper divisors (20603638).

40040426 is a wasteful number, since it uses less digits than its factorization.

40040426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194476.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 40040426 is about 6327.7504691636. The cubic root of 40040426 is about 342.1103630233.

The spelling of 40040426 in words is "forty million, forty thousand, four hundred twenty-six".