40651868 has 24 divisors (see below), whose sum is σ = 75600000. Its totient is φ = 19072368.

The previous prime is 40651861. The next prime is 40651889. The reversal of 40651868 is 86815604.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40651861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5633 + ... + 10631.

It is an arithmetic number, because the mean of its divisors is an integer number (3150000).

Almost surely, 2^40651868 is an apocalyptic number.

It is an amenable number.

40651868 is a deficient number, since it is larger than the sum of its proper divisors (34948132).

40651868 is a wasteful number, since it uses less digits than its factorization.

40651868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5129 (or 5127 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 40651868 is about 6375.8817429435. The cubic root of 40651868 is about 343.8429854014.

The spelling of 40651868 in words is "forty million, six hundred fifty-one thousand, eight hundred sixty-eight".