48391389 has 12 divisors (see below), whose sum is σ = 69981756. Its totient is φ = 32222592.

The previous prime is 48391381. The next prime is 48391391. The reversal of 48391389 is 98319384.

48391389 is a `hidden beast` number, since 483 + 91 + 3 + 89 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 44156025 + 4235364 = 6645^2 + 2058^2 .

It is not a de Polignac number, because 48391389 - 2³ = 48391381 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48391381) 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, 6277 + ... + 11669.

It is an arithmetic number, because the mean of its divisors is an integer number (5831813).

Almost surely, 2^48391389 is an apocalyptic number.

It is an amenable number.

48391389 is a deficient number, since it is larger than the sum of its proper divisors (21590367).

48391389 is a wasteful number, since it uses less digits than its factorization.

48391389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6396 (or 6393 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 48391389 is about 6956.3919527295. The cubic root of 48391389 is about 364.4092250823.

The spelling of 48391389 in words is "forty-eight million, three hundred ninety-one thousand, three hundred eighty-nine".