40931778 has 8 divisors (see below), whose sum is σ = 81863568. Its totient is φ = 13643924.

The previous prime is 40931777. The next prime is 40931827. The reversal of 40931778 is 87713904.

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

40931778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (40931777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3410976 + ... + 3410987.

It is an arithmetic number, because the mean of its divisors is an integer number (10232946).

Almost surely, 2^40931778 is an apocalyptic number.

40931778 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.

40931778 is a wasteful number, since it uses less digits than its factorization.

40931778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6821968.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 40931778 is about 6397.7947763272. The cubic root of 40931778 is about 344.6303623507.

The spelling of 40931778 in words is "forty million, nine hundred thirty-one thousand, seven hundred seventy-eight".