64954440 has 128 divisors (see below), whose sum is σ = 218592000. Its totient is φ = 17155584.

The previous prime is 64954429. The next prime is 64954459. The reversal of 64954440 is 4445946.

64954440 is a `hidden beast` number, since 649 + 5 + 4 + 4 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 64954395 and 64954404.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147741 + ... + 148179.

It is an arithmetic number, because the mean of its divisors is an integer number (1707750).

Almost surely, 2^64954440 is an apocalyptic number.

64954440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64954440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109296000).

64954440 is an abundant number, since it is smaller than the sum of its proper divisors (153637560).

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

64954440 is a wasteful number, since it uses less digits than its factorization.

64954440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 64954440 is about 8059.4317417545. The cubic root of 64954440 is about 401.9786132530.

The spelling of 64954440 in words is "sixty-four million, nine hundred fifty-four thousand, four hundred forty".