40778401 has 2 divisors, whose sum is σ = 40778402. Its totient is φ = 40778400.

The previous prime is 40778377. The next prime is 40778407. The reversal of 40778401 is 10487704.

40778401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38750625 + 2027776 = 6225^2 + 1424^2 .

It is a cyclic number.

It is not a de Polignac number, because 40778401 - 2⁵ = 40778369 is a prime.

It is not a weakly prime, because it can be changed into another prime (40778407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20389200 + 20389201.

It is an arithmetic number, because the mean of its divisors is an integer number (20389201).

Almost surely, 2^40778401 is an apocalyptic number.

It is an amenable number.

40778401 is a deficient number, since it is larger than the sum of its proper divisors (1).

40778401 is an equidigital number, since it uses as much as digits as its factorization.

40778401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 40778401 is about 6385.7968179390. The cubic root of 40778401 is about 344.1993644482.

The spelling of 40778401 in words is "forty million, seven hundred seventy-eight thousand, four hundred one".