64431430 has 32 divisors (see below), whose sum is σ = 136132416. Its totient is φ = 21492864.

The previous prime is 64431427. The next prime is 64431431. The reversal of 64431430 is 3413446.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 64431395 and 64431404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64431431) 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, 9849 + ... + 15028.

It is an arithmetic number, because the mean of its divisors is an integer number (4254138).

Almost surely, 2^64431430 is an apocalyptic number.

64431430 is an abundant number, since it is smaller than the sum of its proper divisors (71700986).

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

64431430 is a wasteful number, since it uses less digits than its factorization.

64431430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24928.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 64431430 is about 8026.9190851783. The cubic root of 64431430 is about 400.8968003701.

Adding to 64431430 its reverse (3413446), we get a palindrome (67844876).

The spelling of 64431430 in words is "sixty-four million, four hundred thirty-one thousand, four hundred thirty".