64427340 has 24 divisors (see below), whose sum is σ = 180396720. Its totient is φ = 17180608.

The previous prime is 64427329. The next prime is 64427353. The reversal of 64427340 is 4372446.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 64427298 and 64427307.

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, 536835 + ... + 536954.

It is an arithmetic number, because the mean of its divisors is an integer number (7516530).

Almost surely, 2^64427340 is an apocalyptic number.

64427340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64427340 is an abundant number, since it is smaller than the sum of its proper divisors (115969380).

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

64427340 is a wasteful number, since it uses less digits than its factorization.

64427340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073801 (or 1073799 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 64427340 is about 8026.6643133994. The cubic root of 64427340 is about 400.8883174366. Note that the first 3 decimals are identical.

Adding to 64427340 its reverse (4372446), we get a palindrome (68799786).

The spelling of 64427340 in words is "sixty-four million, four hundred twenty-seven thousand, three hundred forty".