431489745 has 48 divisors (see below), whose sum is σ = 771410640. Its totient is φ = 222953472.

The previous prime is 431489743. The next prime is 431489749. The reversal of 431489745 is 547984134.

It can be written as a sum of positive squares in 8 ways, for example, as 138384 + 431351361 = 372^2 + 20769^2 .

It is not a de Polignac number, because 431489745 - 2¹ = 431489743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 431489745.

It is not an unprimeable number, because it can be changed into a prime (431489741) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 560721 + ... + 561489.

It is an arithmetic number, because the mean of its divisors is an integer number (16071055).

Almost surely, 2^431489745 is an apocalyptic number.

431489745 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

431489745 is a deficient number, since it is larger than the sum of its proper divisors (339920895).

431489745 is a wasteful number, since it uses less digits than its factorization.

431489745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154 (or 1151 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 431489745 is about 20772.3312365271. The cubic root of 431489745 is about 755.6548825788.

It can be divided in two parts, 431489 and 745, that added together give a palindrome (432234).

The spelling of 431489745 in words is "four hundred thirty-one million, four hundred eighty-nine thousand, seven hundred forty-five".