64406433 has 24 divisors (see below), whose sum is σ = 107583168. Its totient is φ = 33971616.

The previous prime is 64406413. The next prime is 64406453. The reversal of 64406433 is 33460446.

It is an interprime number because it is at equal distance from previous prime (64406413) and next prime (64406453).

It is not a de Polignac number, because 64406433 - 2⁶ = 64406369 is a prime.

It is a super-2 number, since 2×64406433² = 8296377223566978, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 64406433.

It is not an unprimeable number, because it can be changed into a prime (64406413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14941 + ... + 18762.

It is an arithmetic number, because the mean of its divisors is an integer number (4482632).

Almost surely, 2^64406433 is an apocalyptic number.

It is an amenable number.

64406433 is a deficient number, since it is larger than the sum of its proper divisors (43176735).

64406433 is a wasteful number, since it uses less digits than its factorization.

64406433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33733 (or 33726 counting only the distinct ones).

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

The square root of 64406433 is about 8025.3618610004. The cubic root of 64406433 is about 400.8449493116.

Adding to 64406433 its reverse (33460446), we get a palindrome (97866879).

The spelling of 64406433 in words is "sixty-four million, four hundred six thousand, four hundred thirty-three".