40154409 has 12 divisors (see below), whose sum is σ = 58952452. Its totient is φ = 26330400.

The previous prime is 40154407. The next prime is 40154417. The reversal of 40154409 is 90445104.

It can be written as a sum of positive squares in 2 ways, for example, as 15681600 + 24472809 = 3960^2 + 4947^2 .

It is not a de Polignac number, because 40154409 - 2¹ = 40154407 is a prime.

It is a super-2 number, since 2×40154409² = 3224753124278562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40154407) 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, 36022 + ... + 37119.

Almost surely, 2^40154409 is an apocalyptic number.

It is an amenable number.

40154409 is a deficient number, since it is larger than the sum of its proper divisors (18798043).

40154409 is a wasteful number, since it uses less digits than its factorization.

40154409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73208 (or 73205 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 40154409 is about 6336.7506657592. The cubic root of 40154409 is about 342.4346837636.

It can be divided in two parts, 40 and 154409, that added together give a square (154449 = 393²).

The spelling of 40154409 in words is "forty million, one hundred fifty-four thousand, four hundred nine".