40344778 has 8 divisors (see below), whose sum is σ = 61083072. Its totient is φ = 19983756.

The previous prime is 40344727. The next prime is 40344797. The reversal of 40344778 is 87744304.

It is a happy number.

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

It is a super-2 number, since 2×40344778² = 3255402223738568, which contains 22 as substring.

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, 94050 + ... + 94477.

It is an arithmetic number, because the mean of its divisors is an integer number (7635384).

Almost surely, 2^40344778 is an apocalyptic number.

40344778 is a deficient number, since it is larger than the sum of its proper divisors (20738294).

40344778 is a wasteful number, since it uses less digits than its factorization.

40344778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188636.

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 40344778 is about 6351.7539310021. The cubic root of 40344778 is about 342.9749830882.

The spelling of 40344778 in words is "forty million, three hundred forty-four thousand, seven hundred seventy-eight".