40781416 has 32 divisors (see below), whose sum is σ = 82673640. Its totient is φ = 18747648.

The previous prime is 40781413. The next prime is 40781423. The reversal of 40781416 is 61418704.

It can be written as a sum of positive squares in 4 ways, for example, as 22752900 + 18028516 = 4770^2 + 4246^2 .

It is not an unprimeable number, because it can be changed into a prime (40781413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32350 + ... + 33586.

Almost surely, 2^40781416 is an apocalyptic number.

It is an amenable number.

40781416 is an abundant number, since it is smaller than the sum of its proper divisors (41892224).

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

40781416 is a wasteful number, since it uses less digits than its factorization.

40781416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573 (or 1569 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 40781416 is about 6386.0328843500. The cubic root of 40781416 is about 344.2078471701.

It can be divided in two parts, 40 and 781416, that added together give a square (781456 = 884²).

The spelling of 40781416 in words is "forty million, seven hundred eighty-one thousand, four hundred sixteen".