40387780 has 24 divisors (see below), whose sum is σ = 84934080. Its totient is φ = 16132320.

The previous prime is 40387777. The next prime is 40387783. The reversal of 40387780 is 8778304.

It is an interprime number because it is at equal distance from previous prime (40387777) and next prime (40387783).

It is a super-3 number, since 3×40387780³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (40387783) 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, 25615 + ... + 27145.

It is an arithmetic number, because the mean of its divisors is an integer number (3538920).

Almost surely, 2^40387780 is an apocalyptic number.

It is an amenable number.

40387780 is an abundant number, since it is smaller than the sum of its proper divisors (44546300).

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

40387780 is a wasteful number, since it uses less digits than its factorization.

40387780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2859 (or 2857 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 40387780 is about 6355.1380787517. The cubic root of 40387780 is about 343.0967945844.

The spelling of 40387780 in words is "forty million, three hundred eighty-seven thousand, seven hundred eighty".