64619040 has 96 divisors (see below), whose sum is σ = 215550720. Its totient is φ = 16216064.

The previous prime is 64619011. The next prime is 64619053. The reversal of 64619040 is 4091646.

It is a tau number, because it is divible by the number of its divisors (96).

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 = 64618989 and 64619007.

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, 4201 + ... + 12119.

It is an arithmetic number, because the mean of its divisors is an integer number (2245320).

Almost surely, 2^64619040 is an apocalyptic number.

64619040 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 64619040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107775360).

64619040 is an abundant number, since it is smaller than the sum of its proper divisors (150931680).

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

64619040 is a wasteful number, since it uses less digits than its factorization.

64619040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7954 (or 7946 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 64619040 is about 8038.5968924931. The cubic root of 64619040 is about 401.2855307673.

The spelling of 64619040 in words is "sixty-four million, six hundred nineteen thousand, forty".