40730691 has 8 divisors (see below), whose sum is σ = 57502224. Its totient is φ = 25556480.

The previous prime is 40730681. The next prime is 40730693. The reversal of 40730691 is 19603704.

It is a happy number.

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 40730691 - 2⁷ = 40730563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40730693) 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, 399270 + ... + 399371.

It is an arithmetic number, because the mean of its divisors is an integer number (7187778).

Almost surely, 2^40730691 is an apocalyptic number.

40730691 is a deficient number, since it is larger than the sum of its proper divisors (16771533).

40730691 is a wasteful number, since it uses less digits than its factorization.

40730691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798661.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 40730691 is about 6382.0600905977. The cubic root of 40730691 is about 344.0650763624.

The spelling of 40730691 in words is "forty million, seven hundred thirty thousand, six hundred ninety-one".