64430457 has 64 divisors (see below), whose sum is σ = 110992896. Its totient is φ = 32348160.

The previous prime is 64430449. The next prime is 64430473. The reversal of 64430457 is 75403446.

It is a happy number.

It is not a de Polignac number, because 64430457 - 2³ = 64430449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64430417) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 882573 + ... + 882645.

It is an arithmetic number, because the mean of its divisors is an integer number (1734264).

Almost surely, 2^64430457 is an apocalyptic number.

It is an amenable number.

64430457 is a deficient number, since it is larger than the sum of its proper divisors (46562439).

64430457 is a wasteful number, since it uses less digits than its factorization.

64430457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210.

The product of its (nonzero) digits is 40320, while the sum is 33.

The square root of 64430457 is about 8026.8584763904. The cubic root of 64430457 is about 400.8947823356.

The spelling of 64430457 in words is "sixty-four million, four hundred thirty thousand, four hundred fifty-seven".