40054399 has 16 divisors (see below), whose sum is σ = 50077440. Its totient is φ = 31124160.

The previous prime is 40054373. The next prime is 40054433. The reversal of 40054399 is 99345004.

It is a cyclic number.

It is not a de Polignac number, because 40054399 - 2⁷ = 40054271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40054309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49107 + ... + 49915.

It is an arithmetic number, because the mean of its divisors is an integer number (3129840).

Almost surely, 2^40054399 is an apocalyptic number.

40054399 is a deficient number, since it is larger than the sum of its proper divisors (10023041).

40054399 is a wasteful number, since it uses less digits than its factorization.

40054399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 40054399 is about 6328.8544777076. The cubic root of 40054399 is about 342.1501540764.

Subtracting 40054399 from its reverse (99345004), we obtain a triangular number (59290605 = T₁₀₈₈₉).

The spelling of 40054399 in words is "forty million, fifty-four thousand, three hundred ninety-nine".