40077438 has 32 divisors (see below), whose sum is σ = 83482656. Its totient is φ = 12814848.

The previous prime is 40077437. The next prime is 40077439. The reversal of 40077438 is 83477004.

It is a happy number.

40077438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40077437) and next prime (40077439).

It is a junction number, because it is equal to n+sod(n) for n = 40077399 and 40077408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40077437) 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 in 15 ways as a sum of consecutive naturals, for example, 14970 + ... + 17442.

It is an arithmetic number, because the mean of its divisors is an integer number (2608833).

Almost surely, 2^40077438 is an apocalyptic number.

40077438 is an abundant number, since it is smaller than the sum of its proper divisors (43405218).

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

40077438 is a wasteful number, since it uses less digits than its factorization.

40077438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 40077438 is about 6330.6743716606. The cubic root of 40077438 is about 342.2157422656.

The spelling of 40077438 in words is "forty million, seventy-seven thousand, four hundred thirty-eight".