64834440 has 64 divisors (see below), whose sum is σ = 212189760. Its totient is φ = 15717120.

The previous prime is 64834373. The next prime is 64834463. The reversal of 64834440 is 4443846.

It is a super-2 number, since 2×64834440² = 8407009220227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23239 + ... + 25878.

It is an arithmetic number, because the mean of its divisors is an integer number (3315465).

Almost surely, 2^64834440 is an apocalyptic number.

64834440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64834440 is an abundant number, since it is smaller than the sum of its proper divisors (147355320).

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

64834440 is a wasteful number, since it uses less digits than its factorization.

64834440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49142 (or 49138 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 33.

The square root of 64834440 is about 8051.9836065407. The cubic root of 64834440 is about 401.7309156898.

The spelling of 64834440 in words is "sixty-four million, eight hundred thirty-four thousand, four hundred forty".