40154739 has 4 divisors (see below), whose sum is σ = 53539656. Its totient is φ = 26769824.

The previous prime is 40154717. The next prime is 40154743. The reversal of 40154739 is 93745104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40154739 - 2¹⁵ = 40121971 is a prime.

It is a super-2 number, since 2×40154739² = 3224806128316242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40154749) 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, 6692454 + ... + 6692459.

It is an arithmetic number, because the mean of its divisors is an integer number (13384914).

Almost surely, 2^40154739 is an apocalyptic number.

40154739 is a deficient number, since it is larger than the sum of its proper divisors (13384917).

40154739 is a wasteful number, since it uses less digits than its factorization.

40154739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13384916.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 40154739 is about 6336.7767042874. The cubic root of 40154739 is about 342.4356218353.

The spelling of 40154739 in words is "forty million, one hundred fifty-four thousand, seven hundred thirty-nine".