40087278 has 128 divisors (see below), whose sum is σ = 115015680. Its totient is φ = 10044000.

The previous prime is 40087277. The next prime is 40087297. The reversal of 40087278 is 87278004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40087277) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 128743 + ... + 129053.

It is an arithmetic number, because the mean of its divisors is an integer number (898560).

Almost surely, 2^40087278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40087278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57507840).

40087278 is an abundant number, since it is smaller than the sum of its proper divisors (74928402).

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

40087278 is a wasteful number, since it uses less digits than its factorization.

40087278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 40087278 is about 6331.4514923515. The cubic root of 40087278 is about 342.2437474436.

It can be divided in two parts, 400 and 87278, that added together give a palindrome (87678).

The spelling of 40087278 in words is "forty million, eighty-seven thousand, two hundred seventy-eight".