40887978 has 8 divisors (see below), whose sum is σ = 81775968. Its totient is φ = 13629324.

The previous prime is 40887961. The next prime is 40887983. The reversal of 40887978 is 87978804.

It is a sphenic number, since it is the product of 3 distinct primes.

40887978 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 40887978.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3407326 + ... + 3407337.

It is an arithmetic number, because the mean of its divisors is an integer number (10221996).

Almost surely, 2^40887978 is an apocalyptic number.

40887978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40887978 is a wasteful number, since it uses less digits than its factorization.

40887978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6814668.

The product of its (nonzero) digits is 903168, while the sum is 51.

The square root of 40887978 is about 6394.3708056383. The cubic root of 40887978 is about 344.5073919026.

The spelling of 40887978 in words is "forty million, eight hundred eighty-seven thousand, nine hundred seventy-eight".