40308786 has 32 divisors (see below), whose sum is σ = 102372480. Its totient is φ = 11516688.

The previous prime is 40308757. The next prime is 40308787. The reversal of 40308786 is 68780304.

It is a nialpdrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 40308786.

It is not an unprimeable number, because it can be changed into a prime (40308787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52941 + ... + 53696.

It is an arithmetic number, because the mean of its divisors is an integer number (3199140).

Almost surely, 2^40308786 is an apocalyptic number.

40308786 is an abundant number, since it is smaller than the sum of its proper divisors (62063694).

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

40308786 is a wasteful number, since it uses less digits than its factorization.

40308786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106655 (or 106649 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 40308786 is about 6348.9200656490. The cubic root of 40308786 is about 342.8729622165.

The spelling of 40308786 in words is "forty million, three hundred eight thousand, seven hundred eighty-six".