40781907 has 12 divisors (see below), whose sum is σ = 60466840. Its totient is φ = 27165816.

The previous prime is 40781893. The next prime is 40781911. The reversal of 40781907 is 70918704.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 40781907 - 2⁶ = 40781843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40781927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32569 + ... + 33797.

Almost surely, 2^40781907 is an apocalyptic number.

40781907 is a deficient number, since it is larger than the sum of its proper divisors (19684933).

40781907 is an frugal number, since it uses more digits than its factorization.

40781907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2467 (or 1232 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 40781907 is about 6386.0713275065. The cubic root of 40781907 is about 344.2092285622.

The spelling of 40781907 in words is "forty million, seven hundred eighty-one thousand, nine hundred seven".