58440421 has 4 divisors (see below), whose sum is σ = 62935852. Its totient is φ = 53944992.

The previous prime is 58440419. The next prime is 58440433. The reversal of 58440421 is 12404485.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12404485 = 5 ⋅2480897.

It can be written as a sum of positive squares in 2 ways, for example, as 14364100 + 44076321 = 3790^2 + 6639^2 .

It is a cyclic number.

It is not a de Polignac number, because 58440421 - 2¹ = 58440419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 58440421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (58440491) 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, 2247696 + ... + 2247721.

It is an arithmetic number, because the mean of its divisors is an integer number (15733963).

Almost surely, 2^58440421 is an apocalyptic number.

It is an amenable number.

58440421 is a deficient number, since it is larger than the sum of its proper divisors (4495431).

58440421 is a wasteful number, since it uses less digits than its factorization.

58440421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4495430.

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 58440421 is about 7644.6334771525. The cubic root of 58440421 is about 388.0649734426.

The spelling of 58440421 in words is "fifty-eight million, four hundred forty thousand, four hundred twenty-one".