40729599 has 24 divisors (see below), whose sum is σ = 60596640. Its totient is φ = 26350272.

The previous prime is 40729583. The next prime is 40729609. The reversal of 40729599 is 99592704.

It is not a de Polignac number, because 40729599 - 2⁴ = 40729583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40729999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48717 + ... + 49545.

It is an arithmetic number, because the mean of its divisors is an integer number (2524860).

Almost surely, 2^40729599 is an apocalyptic number.

40729599 is a deficient number, since it is larger than the sum of its proper divisors (19867041).

40729599 is a wasteful number, since it uses less digits than its factorization.

40729599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991 (or 988 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 40729599 is about 6381.9745377117. The cubic root of 40729599 is about 344.0620015114.

It can be divided in two parts, 40729 and 599, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 40729599 in words is "forty million, seven hundred twenty-nine thousand, five hundred ninety-nine".