431728878 has 32 divisors (see below), whose sum is σ = 1018644480. Its totient is φ = 119371680.

The previous prime is 431728877. The next prime is 431728879. The reversal of 431728878 is 878827134.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (431728877) and next prime (431728879).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431728873) 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, 164493 + ... + 167096.

It is an arithmetic number, because the mean of its divisors is an integer number (31832640).

Almost surely, 2^431728878 is an apocalyptic number.

431728878 is an abundant number, since it is smaller than the sum of its proper divisors (586915602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

431728878 is a wasteful number, since it uses less digits than its factorization.

431728878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331632.

The product of its digits is 602112, while the sum is 48.

The square root of 431728878 is about 20778.0864855260. The cubic root of 431728878 is about 755.7944522515.

The spelling of 431728878 in words is "four hundred thirty-one million, seven hundred twenty-eight thousand, eight hundred seventy-eight".