64436430 has 16 divisors (see below), whose sum is σ = 154647504. Its totient is φ = 17183040.

The previous prime is 64436419. The next prime is 64436453. The reversal of 64436430 is 3463446.

It is a super-2 number, since 2×64436430² = 8304107022289800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2147881 = 64436430 / (6 + 4 + 4 + 3 + 6 + 4 + 3 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1073911 + ... + 1073970.

It is an arithmetic number, because the mean of its divisors is an integer number (9665469).

Almost surely, 2^64436430 is an apocalyptic number.

64436430 is an abundant number, since it is smaller than the sum of its proper divisors (90211074).

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

64436430 is a wasteful number, since it uses less digits than its factorization.

64436430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147891.

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 64436430 is about 8027.2305311359. The cubic root of 64436430 is about 400.9071702168.

Adding to 64436430 its reverse (3463446), we get a palindrome (67899876).

The spelling of 64436430 in words is "sixty-four million, four hundred thirty-six thousand, four hundred thirty".