40145799 has 8 divisors (see below), whose sum is σ = 53687920. Its totient is φ = 26683776.

The previous prime is 40145779. The next prime is 40145801. The reversal of 40145799 is 99754104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40145799 - 2²⁵ = 6591367 is a prime.

It is a super-2 number, since 2×40145799² = 3223370354696802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40145779) 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, 18844 + ... + 20865.

It is an arithmetic number, because the mean of its divisors is an integer number (6710990).

Almost surely, 2^40145799 is an apocalyptic number.

40145799 is a deficient number, since it is larger than the sum of its proper divisors (13542121).

40145799 is a wasteful number, since it uses less digits than its factorization.

40145799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40049.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 40145799 is about 6336.0712590690. The cubic root of 40145799 is about 342.4102068053.

The spelling of 40145799 in words is "forty million, one hundred forty-five thousand, seven hundred ninety-nine".