64397746 has 32 divisors (see below), whose sum is σ = 117900288. Its totient is φ = 25779600.

The previous prime is 64397689. The next prime is 64397747. The reversal of 64397746 is 64779346.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 64397696 and 64397705.

It is not an unprimeable number, because it can be changed into a prime (64397747) 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, 11521 + ... + 16171.

It is an arithmetic number, because the mean of its divisors is an integer number (3684384).

Almost surely, 2^64397746 is an apocalyptic number.

64397746 is a deficient number, since it is larger than the sum of its proper divisors (53502542).

64397746 is a wasteful number, since it uses less digits than its factorization.

64397746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4726.

The product of its digits is 762048, while the sum is 46.

The square root of 64397746 is about 8024.8206210482. The cubic root of 64397746 is about 400.8269268021.

It can be divided in two parts, 643 and 97746, that added together give a palindrome (98389).

The spelling of 64397746 in words is "sixty-four million, three hundred ninety-seven thousand, seven hundred forty-six".