431011990 has 16 divisors (see below), whose sum is σ = 777032352. Its totient is φ = 172135744.

The previous prime is 431011963. The next prime is 431011991. The reversal of 431011990 is 99110134.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431011991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26839 + ... + 39778.

It is an arithmetic number, because the mean of its divisors is an integer number (48564522).

Almost surely, 2^431011990 is an apocalyptic number.

431011990 is a deficient number, since it is larger than the sum of its proper divisors (346020362).

431011990 is a wasteful number, since it uses less digits than its factorization.

431011990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67271.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 431011990 is about 20760.8282590074. The cubic root of 431011990 is about 755.3758869773.

The spelling of 431011990 in words is "four hundred thirty-one million, eleven thousand, nine hundred ninety".