40027780 has 24 divisors (see below), whose sum is σ = 90524952. Its totient is φ = 14779392.

The previous prime is 40027777. The next prime is 40027781. The reversal of 40027780 is 8772004.

It can be written as a sum of positive squares in 4 ways, for example, as 8398404 + 31629376 = 2898^2 + 5624^2 .

It is not an unprimeable number, because it can be changed into a prime (40027781) 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, 76717 + ... + 77236.

It is an arithmetic number, because the mean of its divisors is an integer number (3771873).

Almost surely, 2^40027780 is an apocalyptic number.

It is an amenable number.

40027780 is an abundant number, since it is smaller than the sum of its proper divisors (50497172).

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

40027780 is a wasteful number, since it uses less digits than its factorization.

40027780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153975 (or 153973 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 40027780 is about 6326.7511409886. The cubic root of 40027780 is about 342.0743429004.

Adding to 40027780 its reverse (8772004), we get a palindrome (48799784).

The spelling of 40027780 in words is "forty million, twenty-seven thousand, seven hundred eighty".