40019784 has 32 divisors (see below), whose sum is σ = 114342720. Its totient is φ = 11434176.

The previous prime is 40019773. The next prime is 40019801. The reversal of 40019784 is 48791004.

40019784 = T₁₁₉ + T₁₂₀ + ... + T₆₂₂.

It is a super-2 number, since 2×40019784² = 3203166222813312, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118939 + ... + 119274.

It is an arithmetic number, because the mean of its divisors is an integer number (3573210).

Almost surely, 2^40019784 is an apocalyptic number.

It is an amenable number.

40019784 is an abundant number, since it is smaller than the sum of its proper divisors (74322936).

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

40019784 is a wasteful number, since it uses less digits than its factorization.

40019784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238229 (or 238225 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 40019784 is about 6326.1191895190. The cubic root of 40019784 is about 342.0515636490.

The spelling of 40019784 in words is "forty million, nineteen thousand, seven hundred eighty-four".