40350729 has 4 divisors (see below), whose sum is σ = 53800976. Its totient is φ = 26900484.

The previous prime is 40350701. The next prime is 40350743. The reversal of 40350729 is 92705304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40350729 - 2⁵ = 40350697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40350696 and 40350705.

It is not an unprimeable number, because it can be changed into a prime (40350229) 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, 6725119 + ... + 6725124.

It is an arithmetic number, because the mean of its divisors is an integer number (13450244).

Almost surely, 2^40350729 is an apocalyptic number.

It is an amenable number.

40350729 is a deficient number, since it is larger than the sum of its proper divisors (13450247).

40350729 is a wasteful number, since it uses less digits than its factorization.

40350729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13450246.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 40350729 is about 6352.2223670146. Note that the first 3 decimals coincide. The cubic root of 40350729 is about 342.9918456074.

The spelling of 40350729 in words is "forty million, three hundred fifty thousand, seven hundred twenty-nine".