40278460 has 12 divisors (see below), whose sum is σ = 84584808. Its totient is φ = 16111376.

The previous prime is 40278449. The next prime is 40278467. The reversal of 40278460 is 6487204.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40278467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1006942 + ... + 1006981.

It is an arithmetic number, because the mean of its divisors is an integer number (7048734).

Almost surely, 2^40278460 is an apocalyptic number.

It is an amenable number.

40278460 is an abundant number, since it is smaller than the sum of its proper divisors (44306348).

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

40278460 is a wasteful number, since it uses less digits than its factorization.

40278460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2013932 (or 2013930 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 40278460 is about 6346.5313360922. The cubic root of 40278460 is about 342.7869547131.

The spelling of 40278460 in words is "forty million, two hundred seventy-eight thousand, four hundred sixty".