40781901 has 8 divisors (see below), whose sum is σ = 54702144. Its totient is φ = 27024800.

The previous prime is 40781893. The next prime is 40781911. The reversal of 40781901 is 10918704.

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

It is a cyclic number.

It is not a de Polignac number, because 40781901 - 2³ = 40781893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40781911) 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, 40200 + ... + 41201.

It is an arithmetic number, because the mean of its divisors is an integer number (6837768).

Almost surely, 2^40781901 is an apocalyptic number.

It is an amenable number.

40781901 is a deficient number, since it is larger than the sum of its proper divisors (13920243).

40781901 is a wasteful number, since it uses less digits than its factorization.

40781901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81571.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 40781901 is about 6386.0708577340. The cubic root of 40781901 is about 344.2092116817.

The spelling of 40781901 in words is "forty million, seven hundred eighty-one thousand, nine hundred one".