431940465 has 32 divisors (see below), whose sum is σ = 837705600. Its totient is φ = 209424960.

The previous prime is 431940409. The next prime is 431940473. The reversal of 431940465 is 564049134.

431940465 is a `hidden beast` number, since 4 + 3 + 194 + 0 + 465 = 666.

It is not a de Polignac number, because 431940465 - 2⁹ = 431939953 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143950 + ... + 146919.

It is an arithmetic number, because the mean of its divisors is an integer number (26178300).

Almost surely, 2^431940465 is an apocalyptic number.

431940465 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

431940465 is a deficient number, since it is larger than the sum of its proper divisors (405765135).

431940465 is a wasteful number, since it uses less digits than its factorization.

431940465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290894 (or 290888 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 431940465 is about 20783.1774519682. The cubic root of 431940465 is about 755.9179017676.

Adding to 431940465 its reverse (564049134), we get a palindrome (995989599).

The spelling of 431940465 in words is "four hundred thirty-one million, nine hundred forty thousand, four hundred sixty-five".