40698729 has 12 divisors (see below), whose sum is σ = 58945536. Its totient is φ = 27059352.

The previous prime is 40698719. The next prime is 40698739. The reversal of 40698729 is 92789604.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40698719) and next prime (40698739).

It is not a de Polignac number, because 40698729 - 2⁷ = 40698601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40698709) 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, 2457 + ... + 9350.

It is an arithmetic number, because the mean of its divisors is an integer number (4912128).

Almost surely, 2^40698729 is an apocalyptic number.

It is an amenable number.

40698729 is a deficient number, since it is larger than the sum of its proper divisors (18246807).

40698729 is a wasteful number, since it uses less digits than its factorization.

40698729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12196 (or 12193 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 40698729 is about 6379.5555487824. Note that the first 4 decimals coincide. The cubic root of 40698729 is about 343.9750550913.

The spelling of 40698729 in words is "forty million, six hundred ninety-eight thousand, seven hundred twenty-nine".