438686545 has 32 divisors (see below), whose sum is σ = 583200000. Its totient is φ = 314138880.

The previous prime is 438686543. The next prime is 438686551. The reversal of 438686545 is 545686834.

It is a happy number.

It is not a de Polignac number, because 438686545 - 2¹ = 438686543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (438686543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1630671 + ... + 1630939.

It is an arithmetic number, because the mean of its divisors is an integer number (18225000).

Almost surely, 2^438686545 is an apocalyptic number.

It is an amenable number.

438686545 is a deficient number, since it is larger than the sum of its proper divisors (144513455).

438686545 is a wasteful number, since it uses less digits than its factorization.

438686545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633.

The product of its digits is 2764800, while the sum is 49.

The square root of 438686545 is about 20944.8453085717. The cubic root of 438686545 is about 759.8329186033.

The spelling of 438686545 in words is "four hundred thirty-eight million, six hundred eighty-six thousand, five hundred forty-five".