40078444 has 12 divisors (see below), whose sum is σ = 80156944. Its totient is φ = 17176464.

The previous prime is 40078427. The next prime is 40078447. The reversal of 40078444 is 44487004.

40078444 is an admirable number.

It is a super-2 number, since 2×40078444² = 3212563346922272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (40078447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715659 + ... + 715714.

Almost surely, 2^40078444 is an apocalyptic number.

It is an amenable number.

40078444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40078444 is a wasteful number, since it uses less digits than its factorization.

40078444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431384 (or 1431382 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 31.

The square root of 40078444 is about 6330.7538255724. The cubic root of 40078444 is about 342.2186056070.

The spelling of 40078444 in words is "forty million, seventy-eight thousand, four hundred forty-four".