40987656 has 96 divisors (see below), whose sum is σ = 118272960. Its totient is φ = 12794496.

The previous prime is 40987651. The next prime is 40987657. The reversal of 40987656 is 65678904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40987651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87535 + ... + 88001.

It is an arithmetic number, because the mean of its divisors is an integer number (1232010).

Almost surely, 2^40987656 is an apocalyptic number.

40987656 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40987656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59136480).

40987656 is an abundant number, since it is smaller than the sum of its proper divisors (77285304).

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

40987656 is a wasteful number, since it uses less digits than its factorization.

40987656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 40987656 is about 6402.1602604121. The cubic root of 40987656 is about 344.7871150415.

The spelling of 40987656 in words is "forty million, nine hundred eighty-seven thousand, six hundred fifty-six".