432135781 has 16 divisors (see below), whose sum is σ = 541605888. Its totient is φ = 334954800.

The previous prime is 432135761. The next prime is 432135797. The reversal of 432135781 is 187531234.

It is a cyclic number.

It is not a de Polignac number, because 432135781 - 2⁹ = 432135269 is a prime.

It is a super-2 number, since 2×432135781² = 373482666440959922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (432135761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16 + ... + 29398.

It is an arithmetic number, because the mean of its divisors is an integer number (33850368).

Almost surely, 2^432135781 is an apocalyptic number.

It is an amenable number.

432135781 is a deficient number, since it is larger than the sum of its proper divisors (109470107).

432135781 is a wasteful number, since it uses less digits than its factorization.

432135781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29592.

The product of its digits is 20160, while the sum is 34.

The square root of 432135781 is about 20787.8758174086. The cubic root of 432135781 is about 756.0318222610.

The spelling of 432135781 in words is "four hundred thirty-two million, one hundred thirty-five thousand, seven hundred eighty-one".